Answer:
See below because there are 9 parts (A through I)
Explanation:
Part A: write an equation that models the area of the figure. Let y represent the area, and write your answer in the form y = ax2 + bx + c.
The figure shows a rectangular table with these dimensions:
Length: - x + 64Witdth: x + 4The area of a rectangle is width × length:
[tex](x + 4)\times (-x+64)[/tex]Use distributive property:
[tex]x\cdot (-x)+x\cdot(64)+4\cdot (-x)+4\cdot (64)=-x^2+64x-4x+256[/tex]Simplify:
[tex]-x^2+64x-4x+256=-x^2+60x+256[/tex]Part B. Graph the equation you wrote in part A. Adjust the zoom of the graphing window so the vertex, x-intercepts, and y-intercept can be seen.
1. Factor the equation:
Common factor - 1:[tex]-x^2+60x+256=-(x^2-60x-256)[/tex]
Find two numbers that add - 60 and whose product is -256. Theyb are -64 and + 4[tex]-(x-64)(x+4)[/tex]
2. Find the roots:
Equal the expression to zero:
[tex]-(x-64)(x+4)=0\\ \\ x-64=0\implies x=64\\ \\ x+4=0\implies x=-4[/tex]
Those are the x-intercepts: (-4,0) and (64,0)
3. Find the symmetry axis:
The simmetry axis is the line x = the middle value between the two roots:
[tex]x=(64-4)/2=60/2=30[/tex]
4. Find the vertex
The vertex has x-coordinate equal to the x axis (30 in this case).
Substitute in the equation of find the y-coordinate:
[tex]y=-(30-64)(30+4)=-(-34)(34)=1,156[/tex]
Hence, the vertex is (30, 1,156)
5. Find the y-intercept
Make x = 0
[tex]y=-(x^2-60x-256)=-(0-256)=256[/tex]
Hence, the y-intercept is (0, 256)
With the x-incercepts, the y-intercept, the axis of symmetry, and the vertex, you can sketch the graph.
You can see now the graph in the attached figure
Part C. Extreme location of the graph
The graph shows that the parabola opens downward. That is due to the fact that the coefficient of the leading term (x²) is negative.
The parabola starts in the second quadrant. starts growing, crosses the x-axis at (-4,0), crosses the y-axis at (0,256), reaches the maximum value at (30, 1156), and then decreases toward the fouth quadrant, crossing the x-axis at (64,0).
Thus the vertex is a maximun, and the coordinates of the maximum are (30, 1156).
Part D. According to the graph, what is the maximum possible area of the game board? Give your answer to the nearest whole number. (Assume that the maximum area is not reduced by the open hole in the game board.)
The maximum possible area of the game is the maximum value of the function y = -x² + 60x + 256.
This value was calculated as y = 1156.
Part E. Use the original expressions for the length and width, and substitute the x-coordinate from the extreme location. What are the length and width of the game board at the extreme location?
The length is:
length = - x + 64 inchesx = 30length = - 30 + 64 = 34 inchesThe width is:
width = x + 4x = 30width = 30 + 4 = 34 inchesPart F. What type of quadrilateral will be formed when the game board covers the maximum possible area?
Since the length and the width are equal, the quadrilateral is a square.
Part G. Suppose the carnival director asks you to create a game board that is 1,120 square inches. Find the dimensions that would meet this request by setting the area equation equal to 1,120, solving for x, and substituting x into the expressions for the length and width.
[tex]y=-x^2+60x+256\\ \\ 1,120=-x^2+60x+256\\ \\ x^2-60x-256+1120=0\\ \\ x^2-60x+864=0[/tex]
Factor:
Find two numbers whose sum is - 60 and the product os 864. They are -24 and - 34:
[tex]x^2-60x+864=(x-24)(x-36)[/tex]
Use the zero product rule:
[tex](x-24)(x-36)=0\\ \\ x-24=0\implies x=24\\ \\ x-36=0\implies x=36[/tex]
Now substitute to find the dimensions:
x = 36
length = - x + 64length = - 36 + 64 = 28width = x + 4 = 36 + 4 = 40Hence, legth = 28, width = 40
x = 24
length = - x + 64 = -24 + 64 = 40width = x + 4 = 24 + 4 = 28Part H. When you solved the area equation for x, did any extraneous solutions result? Describe how an extraneous solution would arise in this situation.
The two solutions are valid (non extraneous) because both leads to positive real dimensions for which the areas can be 1,120 in².
28×40 = 1,12040×28 = 1,120An extraneous solution could arise if you try to find areas for which x is greater than or equal to 64, because in that case - x + 64 would be zero or negative and dimensions must be positive.
For the same reason, also an extraneous solution would arise if you try to fix areas for which x is less than or equal to - 4.
So, the domain of your function has to be - 4 < x < 64.
Part I. What method of solving quadratics did you use to solve the equation set equal to 1,120? Why did you choose this method?
The method use was factoring.
Discuss the usefulness of other methods of solving quadratics as they pertain to this scenario.
The other importants methods are graphical and the quadratic equation.
For graphical method you graph your parabola and find the values of x that sitisfies the area searched (value of y).
The quadratic equation gives the y-values (areas) without factoring:
[tex]\frac{-b+/-\sqrt{b^2-4(a)(c)} }{2(a)}[/tex]
The measure of an interior angle of a triangle is 10n the measure of the corresponding exterior angle is 30 more then half the measure of the interior angle. What are the interior and exterior angles?
Answer:
Interior angle 100 degrees
Exterior angle 80 degrees
Step-by-step explanation:
we know that
The sum of an exterior angle of a triangle and its adjacent interior angle is 180 degrees.
we have that
[tex]10n+(5n+30)=180[/tex]
solve for n
[tex]10n+5n=180-30[/tex]
[tex]15n=150[/tex]
[tex]1n=10[/tex]
Find the measure of the interior angle
[tex]10n=10(10)=100^o[/tex]
Find the measure of the exterior angle
[tex](5n+30)=5(10)+30=80^o[/tex]
Keyshia is riding her bike on Bay View Bike Path. Keyshia's bike got a flat tire 2/3 of the way down the path, so she had to stop. How far did Keyshia ride? Bay View Bike Path is 7/8 a mile.
Answer: Keyshia rode 16/21 miles
Step-by-step explanation:
The distance of Bay View Bike Path is 7/8 a mile.
Keyshia is riding her bike on Bay View Bike Path and Keyshia's bike got a flat tire 2/3 of the way down the path and she had to stop.
This means that the total distance that she rode before her bike got a flat tire would be
2/3 × 7/8 = 2/3 × 8/7 = 16/21 miles.
Converting 16/21 miles to decimal, it becomes 0.76 miles
Keyshia rode 7/12 of a mile before getting a flat tire.
Explanation:To solve this question, we need to find the distance Keyshia rode before her bike got a flat tire.
From the information given, we know that the Bay View Bike Path is 7/8 of a mile long. Keyshia rode 2/3 of the way down the path before stopping.
To find how far Keyshia rode, we can multiply the length of the path by the fraction of the path she rode:
2/3 x 7/8 = (2 x 7)/(3 x 8) = 14/24 = 7/12
Therefore, Keyshia rode 7/12 of a mile before getting a flat tire.
A set of 15 different integers has median of 25 and a range of 25. What is greatest possible integer that could be in this set?A. 32B. 37C. 40D. 43E. 50
Answer:
The correct option is D.
Step-by-step explanation:
It is given that a set of 15 different integers has median of 25 and a range of 25.
Median = 25
Median is the middle term of the data. Number of observations is 15, which is an odd number so median is
[tex](\frac{n+1}{2})th=(\frac{15+1}{2})th=8th[/tex]
8th term is 25. It means 7 terms are less than 25. Assume that those 7 numbers are 18, 19, 20, 21, 22, 23, 24. Largest possible minimum value of the data is 18.
Range = Maximum - Minimum
25 = Maximum - 18
Add 18 on both sides.
25+18 = Maximum
43 = Maximum
The greatest possible integer in this set 43.
Therefore, the correct option is D.
Landon wants to buy a pizza. The full cost of the pizza is $18. Landon receives an e-mail offer for one-third off the cost of the pizza. How much money will Landon save on the pizza through the e-mail offers?
Answer:
$12
Step-by-step explanation:
The equation here is (18*2/3).
18 divided by 3 is 6.
6 multiplied by 2 is 12.
Hence, the answer is 12.
As your sample size grows larger, the n - 1 adjustment for the standard deviation has a:______
As your sample size grows larger, the n - 1 adjustment for the standard deviation has a smaller impact on the estimates of standard deviation.
Step-by-step explanation:
The average (mean) of sample's distribution seems to be the same as the distribution mean at which samples were taken. The means of mean distribution will not change. However, the standard deviations for the samples mean is the standard deviations of the primary distribution divided by square roots of the samples size.
The standard deviations of means decreases as the samples size increases. Likewise, when the samples size decreases, the standard deviations for the samples mean increases. So, there is a little impact on standard deviations estimation when sample size increases.
Ojinska sold many more raffle tickets when she told people they had a 10 percent chance of winning a prize than when she told them they had a 90 percent chance of not winning. This best illustrates the importance of Select one: A. the availability heuristic. B. confirmation bias. C. framing. D. the belief perseverance.
Answer: C. framing
Step-by-step explanation:
People tends to decides on options based on the type of framing presented to them. Framing effect is a cognitive bias where people decide on options presented to them based on whether it's presented with positive or negative connotations and remarks. In the case above, the reaction of people to the same idea when presented positively and negatively was different. It implies that the framing of the same idea may influence people's decision
help please! I need this asap!!!!!
Answer:
[tex]\displaystyle \frac{a^2 }{b^2}=\frac{4}{9}[/tex]
[tex]\displaystyle \frac{a}{b}=\frac{2}{3}[/tex]
[tex]\displaystyle \frac{a^3}{b^3}=\frac{8}{27}[/tex]
Step-by-step explanation:
Ratios and Proportions
The ratio between two numbers x and y is defined as x/y. It measures how many times y is contained in x. For example 12/8 = 1.5 means 12 is 1.5 times 8.
We have two key sets of data: the ratio between the surface areas of the cylinders and the fact that the radius and heights of the cylinders come in the same proportion.
First, we can easily compute the ratio of the surface areas
[tex]\displaystyle \frac{Area_1}{Area_2}=\frac{8\pi \ in^2 }{18\pi \ in^2}=\frac{4}{9}[/tex]
It gives us the relation
[tex]\displaystyle \frac{a^2 }{b^2}=\frac{4}{9}[/tex]
Computing the square root
[tex]\displaystyle \frac{a}{b}=\frac{2}{3}[/tex]
Computing the cube
[tex]\displaystyle \frac{a^3}{b^3}=\frac{8}{27}[/tex]
Of the 13 Journeymen on a jobsite, there are 5 females. What is the ratio of males to females on this job?
Answer:
8:5
Step-by-step explanation:
Answer: 8 to 5
Step-by-step explanation:
5 females
13-5 males = 8 males
8 to 5
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 37 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that ? is known to be $1.94 per 100 pounds.
(a) Find a 90% confidence interval for the population mean price (per 100 pounds) that farmers in this region get for their watermelon crop. What is the margin of error? (Round your answers to two decimal places.) lower limit $ upper limit $ margin of error $
(b) Find the sample size necessary for a 90% confidence level with maximal error of estimate E = 0.25 for the mean price per 100 pounds of watermelon. (Round up to the nearest whole number.) farming regions
(c) A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
Hint: 1 ton is 2000 pounds. (Round your answers to two decimal places.) lower limit $ upper limit $ margin of error $
(a) 90% confidence interval for price: (6.35, 7.41), margin of error: $0.53.
(b) Sample size for desired error (E=$0.25): 131 farming regions.
(c) 90% confidence interval for cash value: ($190,500, $222,300), margin of error: $15,900.
Confidence Interval and Sample Size for Watermelon Price
(a) 90% Confidence Interval and Margin of Error:
Standard Error: σ / √n = 1.94 / √37 ≈ 0.32
Critical Value (90%): z(α/2) ≈ 1.645
Margin of Error: E = z(α/2) * σ / √n ≈ 0.32 * 1.645 ≈ 0.53
Lower Limit: x - E ≈ 6.88 - 0.53 ≈ 6.35
Upper Limit: x + E ≈ 6.88 + 0.53 ≈ 7.41
The 90% confidence interval is (6.35, 7.41)*, with a margin of error of $0.53.
(b) Sample Size for Desired Error:
Rearrange formula for sample size: n = (z(α/2) * σ / E)^2 ≈ (1.645 * 1.94 / 0.25)^2 ≈ 130.34
Round up to nearest whole number: n = 131 farming regions
(c) 90% Confidence Interval for Cash Value:
Convert tons to pounds: 15 tons * 2000 pounds/ton = 30,000 pounds
Apply confidence interval to total value: 30,000 * (6.35, 7.41) ≈ (190,500, 222,300)
Margin of error: 30,000 * 0.53 ≈ 15,900
The 90% confidence interval for the cash value is ($190,500, $222,300), with a margin of error of $15,900.
Therefore, (a) 90% confidence interval for price: (6.35, 7.41), margin of error: $0.53
(b) Sample size for desired error (E=$0.25): 131 farming regions
(c) 90% confidence interval for cash value: ($190,500, $222,300), margin of error: $15,900
Graph the function.
f(x)=−1/5x+4
Use the Line tool and select two points to graph.
Which of the following are true statements?
I. Both dotplots and stemplots can show symmetry, gaps, clusters, and outliers.
II. In histograms, relative areas correspond to relative frequencies.
III. In histograms, frequencies can be determined from relative heights.
Answer:
I and II.
Step-by-step explanation:
Dot plots are charts that represent data points on a simple scale using filled circles. Stemplots allow plotting data by dividing it into stems (largest digit) and leaves (smallest digits). Both dot plots and stemplots are like histograms since they allow to compare data relating to only one variable, and are used for continuous, quantitive data, highlighting gaps, clusters, and outliers.
Histograms use bars to represents amounts, with no space between the bars and the height of the bars is proportional to the frequency or relative frequency of the represented amount. We refer to the relative frequency of a case when this frequency is divided by the sum of all frequencies of the cases. The proportionality between the height of the bar and the frequency is right when the width (interval) of the bar is the same for everyone, on the contrary, the area of the bar would be proportional to the frequency of cases.
Therefore, of all the above, the correct statements are I and II. Statement III is incorrect because relative heights are proportional to relative frequencies.
I hope it helps you!
Both dotplots and stemplots can show features like symmetry, gaps, clusters, and outliers. The relative areas in a histogram correspond to relative frequencies. However, frequencies in a histogram cannot be determined from relative heights alone, but from the area of the bars.
Explanation:The subject of this question pertains to the interpretation and understanding of various graphical representations in statistics. Let's examine each statement in turn:
Both dotplots and stemplots can show symmetry, gaps, clusters, and outliers: This is true. Both these plot types can effectively depict all these features of a data set.In histograms, relative areas correspond to relative frequencies: This statement is also true. The area of each bar in the histogram represents the relative frequency of the data range that it covers.In histograms, frequencies can be determined from relative heights: This statement is false. The frequency in a histogram is determined by the area of the bar, not just its height. While height is a factor, you also must take into account the width of the bar.Learn more about Graphical Representations in Statistics here:https://brainly.com/question/33662804
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Calculate the slope of the line by applying the slope formula. Use the following two points to substitute into the slope formula. Point 1 (−2, 4) and Point 2 (4, −8) Identify the x-coordinates and y-coordinates to substitute in the formula.
x 1 =
Answer:
Slope intercept form - y = −2x
Slope is m = −2
Slope
m=y2-y1/x2-x1m=-8-4/4+2m=-12/6m=-2Jacob found a computer game that was on sale at 20% off its original price. Which expression below will find the sale price, s, of the computer game, if p represents the original price of the product?
Answer:
Step-by-step explanation:
Let p represent the original price of the computer game.
Let s represent the sales price of the computer game.
Jacob found a computer game that was on sale at 20% off its original price. This means that the amount that was taken off the original price would be
20/100 × p = 0.2 × p = 0.2p
The expression for the sale price would be
s = p - 0.2p
s = 0.8p
If 5x=y+75x=y+7, is (x−y)>0(x−y)>0? (1) xy=6xy=6 (2) xx and yy are consecutive integers with the same sign
Answer:
No. If 5x=y+7 then xy=6 and (2) x and y are consecutive integers with the same sign. for xy=6
Step-by-step explanation:
For the sake of clarity:
If 5x=y+7 then (x – y) > 0?
Alternatives:
(1) xy = 6
(2) x and y are consecutive integers with the same sign
1) Consider (x-y)>0 as true:
[tex]xy=6[/tex] Numbers like, 3*2, 6*1, etc..
[tex]5x=y+7\Rightarrow \frac{5x}{5}=\frac{y+7}{5}\Rightarrow x=\frac{y+7}{5}\\Plugging\: in:\:\\\frac{y+7}{5}-y>0\Rightarrow \frac{y+7-5y}{5}>0\Rightarrow \frac{-4y+7}{5}>0\Rightarrow \frac{-4y+7}{5}*5>0*5\\-4y+7>0 *(-1)\Rightarrow 4y-7<0\:y>\frac{7}{4}\therefore y<1.75[/tex]
Since y in this hypothetical case is lesser then let's find x, let's plug in y 1 for a value lesser than 1.75:
Then xy≠6 and no and 8/5 (1.75) is a rational number. What makes false the second statement about consecutive integers.
So this is a Contradiction. (x-y) >0 is not true for 5x=x+7.
2) Consider:
x and y are consecutive integers with the same sign is true.
Algebraically speaking, two consecutive integers with the same sign can be written as:
[tex]y=x+1[/tex]
Plugging in the first equation (5x=y+7):
5x=x+1+7⇒4x=8 ⇒x =2
Since y=3 then x=2 because:
[tex]3=x+1\\3-1=x+1-1\\2=x \Rightarrow x=2[/tex]
3) Testing it
[tex]5x=y+7\\\\5(2)=(3)+7\\\\10=10\:True[/tex]
[tex]xy=6\\2*3=6\\6=6[/tex]
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Given: ∆ABC, AB = 45 AC = CB = 34 Find: m∠B
Answer:
[tex]48.5654 \textdegree[/tex]
Step-by-step explanation:
Let [tex]D[/tex] be the mid point of [tex]AB[/tex]
Now in [tex]\Delta ACD\ and\ \Delta BCD[/tex]
[tex]AC=CB \ (given)\\CD=CD \ (common\ side)\\AD=DB \ (D\ is\ mid\ point\ of\ AB)[/tex]
[tex]Hence\ \Delta ACD\cong\Delta BCD[/tex]
[tex]\angle A=\angle B\\\angle ACD=\angle BCD\\\angle ADB=\angle BDC[/tex]
[tex]\angle ADB+\angle BDC=180\\2\angle ADB=180\\\angle ADB=90[/tex]
[tex]in \Delta BCD\\\cos\angle B=\frac{BD}{BC}\\ =\frac{45}{2\times34}\\ =\frac{45}{68} \\\angle B=\cos^{-1}(\frac{45}{68} )\\\angleB=48.5654\textdegree[/tex]
In a store window, there was a flat containing boxes of berries having a total weight of $200$ kg. An analysis showed that the berries were $99\%$ moisture, by weight. After two days in the sun, a second analysis showed that the moisture content of the berries was only $98\%$, by weight. What was the total weight of the berries after two days, in kg?
Answer:
100 kg
Step-by-step explanation:
Data provided in the question:
Initial total weight of the berries = 200 kg
Initial weight of water present = 99% of the weight
= 198 kg
therefore,
Initial weight of the solids in berries = 200 kg - 198 kg = 2 kg
After 2 days water was 98% of the total weight of the berries
Thus,
2% was solid which means 2 kg was 2% of the total weight of the berries
Thus,
2% of Total weight of berries after two days = 2 kg
or
0.02 × Total weight of berries after two days = 2 kg
or
Total weight of berries after two days = [ 2 ÷ 0.02 ] kg
or
Total weight of berries after two days = 100 kg
Answer:
100 kilograms!!!!
Step-by-step explanation:
First of all, let's find the variable and what it should represent.
Let's say m stands for the moisture in the berries.
Since the berries are 200 kg and the moisture in the berries is 99%, which is 198 kg. 2 kg remain, so we the left part of our equation will be :
m/(m+2).
The right part of our equation will be 0.98 because 0.98 is 98%, which is m.
m/(m+2)=0.98.
When we multiply m+2 on both sides, we get:
m=0.98m+1.96.
Subtracting 0.98m on both sides gives us 0.02m=1.96.
Dividing 0.02 on both sides gives us:
m=98.
The question is asking what is the total weight of the berries after two days, so we add 2 to 98, or 2+m, which is 100.
100 kilograms is the answer.
Hope this helped and thanks y'all!!!
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Leslie Grace made a deposit to her checking account at an ATM and received $75 in cash. The checks deposited was $25 more than the check amount. Determine the amounts Leslie deposited in checks and in currency as well as the total deposit.
Answer:
$50
Step-by-step explanation:
At the city museumy child admission is and admission is $9.30. On Monday four times as many adult tickets as child tickets were sold for a total of sales of $1548.00 . How many child tickets were sold that day.
Question:
At the city museum, child admission is $5.80 and adult admission is $9.30. On Monday, four times as many adult tickets as child tickets were sold, for a total sales of $1548.00. How many child tickets were sold that day?
Answer:
36 child tickets were sold
Solution:
Given that,
Cost of 1 child admission = $ 5.80
Cost of 1 adult admission = $ 9.30
Let "c" be the number of child tickets sold
Let "a" be the number of adult tickets sold
On Monday, four times as many adult tickets as child tickets were sold
Number of adult tickets sold = four times the number of child tickets
Number of adult tickets sold = 4(number of child tickets sold)
a = 4c ----- eq 1
They were sold for a total sales of $ 1548.00
number of child tickets sold x Cost of 1 child admission + number of adult tickets sold x Cost of 1 adult admission = 1548.00
[tex]c \times 5.80 + a \times 9.30 = 1548[/tex]
5.8c + 9.3a = 1548 ---- eqn 2
Let us solve eqn 1 and eqn 2 to find values of "c" and "a"
Substitute eqn 1 in eqn 2
5.8c + 9.3(4c) = 1548
5.8c + 37.2c = 1548
43c = 1548
c = 36
Thus 36 child tickets were sold that day
(A) the company issued stock and collected cash totaling $30,000; (B) the company paid an account payable of $6,000; (C) the company purchased supplies for $1,000 with cash; (D) the company purchased land for $60,000 paying $10,000 with cash and signing a note payable for the balance. What is total stockholders' equity after the transactions above?
This question is incomplete, here is the complete question;
Question:
A company's January 1, 2016 balance sheet reported total assets of $120,000 and total liabilities of $40,000. During January 2016, the following transactions occurred: (A) the company issued stock and collected cash totaling $30,000; (B) the company paid an account payable of $6,000; (C) the company purchased supplies for $1,000 with cash; (D) the company purchased land for $60,000 paying $10,000 with cash and signing a note payable for the balance. What is total stockholders' equity after the transactions above?
Answer: $110 000
Step-by-step explanation:
Company total assets = $120 000
Company liabilities = $40 000
Beginning equity = total assets - liabilities
Beginning equity = $120,000 − $40,000 = $80,000.
Only transaction (A) affects stockholders' equity.
Therefore, stockholders' equity = $80,000 + $30,000 = $110,000
A certain casino uses 10 standard decks of cards mixed together into one big deck, which we will call a superdeck. Thus, the superdeck has 52 · 10 = 520 cards, with 10 copies of each card. How many different 10-card hands can be dealt from the superdeck? The order of the cards does not matter, nor does it matter which of the original 10 decks the cards came from. Express your answer as a binomial coefficient.
Answer:
(₁₀⁶¹)
Step-by-step explanation:
In order to select 'm' item from a given set of 'n' items, the binomial coefficient is commonly used. In this problem, there are card with numbers from 1 ... 52, if we have 'i' type of cards with the total number of [tex]x_{i}[/tex]. Then:
[tex]x_{i}[/tex] ∈ positive real numbers
0 ≤ [tex]x_{i}[/tex] ≤ 10
Therefore, if we use the Bose-Einstein theorem, the different methods of dealing with the cards are:
(₁₀⁵²⁺¹⁰⁻¹) = (₁₀⁶¹)
Final answer:
The number of different 10-card hands that can be dealt from a superdeck is calculated using the combination formula C(520, 10), which accounts for choosing 10 cards from 520 without considering the order.
Explanation:
To determine how many different 10-card hands can be dealt from a superdeck consisting of 10 standard decks of cards, we need to calculate the combination of 520 cards taken 10 at a time. Since the order of the cards does not matter, we use the combination formula:
C(n, k) = n! / (k! * (n - k)!)
where n is the total number of cards in the superdeck (520), and k is the number of cards in the hand (10). The factorial function, represented by an exclamation mark (!), means to multiply a series of descending natural numbers. Thereore:
C(520, 10) = 520! / (10! * (520 - 10)!)
This represents the number of ways to choose 10 cards from a superdeck of 520 cards without regard to the order.
Area addition and subtraction
Answer:Area of the shaded region is 73.6 cm^2
Step-by-step explanation:
The circle is divided into two sectors. The Smaller sector contains the triangle. The angle that the smaller sector subtends at the center of the circle is 80 degrees. Since the total angle at the center of the circle is 360 degrees, it means that the angle that the larger sector subtends at the center would be 360 - 80 = 280 degrees
Area of a sector is expressed as
Area of sector = #/360 × πr^2
# = 280
r = 5 cm
Area of sector = 280/360 × 3.14 × 5^2
Area of sector = 61.06 cm^2
Area of the triangle is expressed as
1/2bh = 1/2 × 5 × 5 = 12.5
Area of the shaded region = 61.06 +
12.5 = 73.6
which rule describes the transformation that is a reflection across the x-acis
Answer:
When you reflect a point across the line y = x, the x-coordinate and y-coordinate change places. If you reflect over the line y = -x, the x-coordinate and y-coordinate change places and are negated (the signs are changed). the line y = x is the point (y, x). the line y = -x is the point (-y, -x).
For all nonzero values of x and y, which of the following expressions cannot be negative?
F. x-y
G. |x| - |y|
H. |xy| - y
J. |x| + y
K. |xy|
Answer:
K
Step-by-step explanation:
Values of x and y are either negative or positive, but not 0. Lets try to make each choice "negative", so we can eliminate it.
F. x - y
If y is greater than x in any positive number, the result is negative.
1 - 3 = -2
So, this can be negative.
G. |x| - |y|
Here, if y > x for some positive number, we can make it negative. Such as shown below:
|5| - |8|
= 5 - 8
= -3
So, this can be negative.
H.
|xy| - y
Here, if y is quite large, we can make this negative and let x be a fraction. So,
|(0.5)(10)| - 10
|5| - 10
5 - 10
-5
So, this can be negative.
J. |x| + y
This can negative as well if we have a negative value for y and some value for x, such as:
|7| + (-20)
7 - 20
-13
So, this can be negative.
K. |xy|
This cannot be negative because no matter what number you give for x and y and multiply, that result WILL ALWAYS be POSITIVE because of the absolute value around "xy".
So, this cannot be negative.
Final answer:
The expression that cannot be negative for all nonzero values of x and y is K. |xy|. This is because the absolute value of any number, including the product xy, is always nonnegative.
Explanation:
Among the given options, K. |xy| is the expression that cannot be negative for all nonzero values of x and y. The reason for this is that the absolute value of any real number, including the product xy, is always nonnegative. This is due to the definition of absolute value, which measures the magnitude or distance of a number from zero on the number line, disregarding the direction (positive or negative). Therefore, even if x or y or both are negative, resulting in a negative product, the absolute value symbol converts this to a positive value. This fundamental property of absolute values ensures that K. |xy| will always return a nonnegative result, making it impossible to be negative.
Justin earns $8 an hour for the first 40 hours he works and $12 for each additional hour. How much will justin earn for a week in which he worked 48 hours
Answer:
Step-by-step explanation:
Let x represent the number of hours that Justin works in a week.
Let y represent the total amount that Justin would receive for working for x hours.
Justin earns $8 an hour for the first 40 hours he works and $12 for each additional hour. This means that the total amount that he earns in a week would be
y = 8×40 + 12(x - 40)
y = 320 + 12(x - 40)
If he earns 48 hours in a week, the total amount that he earned would be
320 + 12(48 - 40) = $416
You work as a health inspector and must visit each of the 15 restaurants in town once each week. In how many different orders can you make these inspections?
Answer: 15! or 1307674368000
Step-by-step explanation:
According to the permutations , if we arrange n things in order , then the total number of ways to arrange them = n!
Similarly , when health inspector inspects 15 restaurants in town once each week, the number of different orders can be made for these inspections = 15!
= 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
=1307674368000
Hence, the number of different orders can be made for these inspections = 15! =1307674368000
The number of different orders in which a health inspector can visit 15 restaurants in a week is calculated by computing 15 factorial (15!), resulting in 1,307,674,368,000 different permutations.
Explanation:The question pertains to the concept of permutations where one is required to determine the number of different orders in which a series of events can occur without repetition. Since the health inspector has to visit 15 different restaurants without visiting the same one more than once in a week, we are dealing with permutations of distinguishable outcomes without repetition where all outcomes are selected. The formula for permutation is n! (n factorial), where n is the number of items to permute. In this case, n is 15 (the number of restaurants).
To calculate the number of different orders for these inspections, you would compute 15!, which is 15 x 14 x 13 x ... x 1. This calculation results in 1,307,674,368,000 different orders in which the health inspector can visit the 15 restaurants. Note that a factorial is the product of all positive integers less than or equal to n. Such permutations ensure that each restaurant is visited once and only once each week, which aligns with professional standards for comprehensive inspections.
The prism below has a volume of 21 cubic units.The base is a right triangle with legs that have lengths of 2 units and 3 units,Find the height of the prism
Answer:
The height of the prism is 7 unit
Step-by-step explanation:
Given as :
The volume of right triangle prism = v = 21 cubic unit
The length of one base = [tex]b_1[/tex] = 2 unit
The length of other base = [tex]b_2[/tex] = 3 unit
Let The height of the prism = h unit
Now, According to question
Volume of prism = [tex]\dfrac{1}{2}[/tex] × [tex]b_1[/tex] × [tex]b_2[/tex]× height
Or, v = [tex]\dfrac{1}{2}[/tex] × [tex]b_1[/tex] × [tex]b_2[/tex]× h
Or, 21 cubic unit = [tex]\dfrac{1}{2}[/tex] × 2 unit × 3 unit × h unit
Or, 21 = [tex]\dfrac{1}{2}[/tex] × 6 × h
Or, 21 = 3 × h
∴ h = [tex]\dfrac{21}{3}[/tex]
i.e h = 7 unit
So,The height of the prism = h = 7 unit
Hence, The height of the prism is 7 unit Answer
Answer:
The base (b) of the triangle is
✔ 3
units.
The height (h) of the triangle is
✔ 5
units.
The area of the triangle is
✔ 7.5
square units.
Step-by-step explanation:
On a baseball diamond, the distance from first base to third base is approximately 127 feet. How many inches is the distance from first base to third base?A) 381 inchesB) 1,524 inchesC) 42 1/3 inchesD) 13,716 inches
Answer: here is the whole thing
1. B
2. C
3. D
4. C
5. D
PLS MARK BRAINLIST
Tell whether the lines through the given points are parallel, perpendicular, or neither. (-3,1), (-7,-2), (2,-1), (8,4)
Answer:
neither
Step-by-step explanation:
(-3,1), (-7,-2)
Slope of the line containing point (-3,1), (-7,-2) is
[tex]slope = \frac{y_2-y_1}{x_2-x_1} =\frac{-2-1}{-7+3} =\frac{3}{4}[/tex]
Slope of the line containing point (2,-1), (8,4) is
[tex]slope = \frac{y_2-y_1}{x_2-x_1} =\frac{4+1}{8-2} =\frac{5}{6}[/tex]
Slope of both the lines are not same, so they are not parallel
the slope of both the lines are not negative reciprocal of one another
So they are not perpendicular
Hence they are neither parallel nor perpendicular.
On the first day of a marketing campaign, a team sent a total of 14 emails to potential clients. Their goal is to increase the number of emails sent per day by 15 each day. If the team met but did not exceed this goal, how many emails, in total, did it send during the 30 day marketing campaign?
Answer:it sent 6945 during the 30 day marketing campaign
Step-by-step explanation:
Their goal is to increase the number of emails sent per day by 15 each day. The rate at which they increased the number of mails sent is in arithmetic progression.
The formula for determining sum of n terms of an arithmetic sequence is expressed as
Sn = n/2[2a + (n - 1)d]
Where
a represents the first term of the sequence.
n represents the number of terms.
d = represents the common difference.
From the information given
a = 14
d = 15
n = 30
We want to find the sum of 30 terms, S30. It becomes
S30 = 30/2[2 × 14 + (30 - 1)15]
S30 = 15[28 + 435]
S30 = 6945
What is the 100th term of the sequence with a1 = 222 and d = -5?
-273
-278
717
722
Answer:
-273
222
217
212
207
202
197
192
187
182
177
172
167
162
157
152
147
142
137
132
127
122
117
112
107
102
97
92
87
82
77
72
67
62
57
52
47
42
37
32
27
22
17
12
7
2
-3
-8
-13
-18
-23
-28
-33
-38
-43
-48
-53
-58
-63
-68
-73
-78
-83
-88
-93
-98
-103
-108
-113
-118
-123
-128
-133
-138
-143
-148
-153
-158
-163
-168
-173
-178
-183
-188
-193
-198
-203
-208
-213
-218
-223
-228
-233
-238
-243
-248
-253
-258
-263
-268
-273
Step-by-step explanation:
Answer:
[tex]u_{n} = a + (n - 1)d\\\\n = 100, a = 222, d = -5\\\\
Substitute the values in.\\\\
u_{100} = 222 + (100 - 1)(-5)\\\\
u_{100} = 222 + (99)(-5)\\\\
u_{100} = 222 + (99)(-5)\\\\
u_{100} = 222 +-495\\\\
u_{100} = -273[/tex]