Step-by-step explanation:
f(x) = 15(b)x
f(4) = 1215
15(b)4 = 1215
(15)(4)b = 1215
60b = 1215
60b / 60 = 1215 / 60
b = 20.25
Check the answer
15 * 20.25 * 4 = 1215
Answer:
3
Step-by-step explanation:
if you did this on prepworks its 3.
1215=15(b)4
121515=(b)4
81=b4
92=b4
(32)2=b4
34=b4
b = ±3
The graph shows the distance a cyclist traveled in yards (y) as a function of time in seconds (x). The graph is divided into four segments; labeled P, Q, R, and S, respectively.
Which segment did the cyclist complete before stopping for a drink of water?
P
Q
R
S
Answer:
P
Step-by-step explanation:
The distance doesn't change during segment Q, so that is when the cyclist is stopped. The segment before that is labeled P.
The question asks the label of the segment before the one where the cyclist was stopped, so the appropriate choice is P.
Answer:
it is Q
Step-by-step explanation:
Because it is stopped and its a strait line making it look like it is taking a brake.
At the produce counter, 71⁄5 pounds of seedless grapes cost $12.89. How much would 3 pounds cost? A. $3.58 B. $5.16 C. $1.79 D. $5.37
Answer:
D. $5.37
Step-by-step explanation:
We need to figure out how much grapes cost per pound
Change the mixed number to an improper fraction
7 1/5 = (5*7+1) /5 = 36/5
$12.89 / 36/5
Copy dot flip
12.89 * 5/36 = 1.79 per lb
If we are purchasing 3 pounds, we will multiply by 3
3 lbs * $1.79 / lb = $5.37
Veronica is choosing between two health clubs. After how many months will the total cost for each health club be the same? Yoga Studio A: Membership: $24.00 Monthly Fee: 21.50. Yoga Studio B: Membership: $41.00 Monthly Fee: $17.25
In 4 months, the total cost of Yoga Studio A would equal that of Yoga Studio B
The cost of Yoga Studio A at any given month can be represented as:
= Membership fee + (Monthly fee x Number of months)
Assuming number of months is x, the formula would be:
= 24 + (21.50 × x)
= 24 + 21.50x
Yoga Studio B would be:
= 41 + (17.25 × x)
= 41 + 17.25x
In order to find the month that these costs would be equal, equate both formulas:
24 + 21.50x = 41 + 17.25x
21.50x - 17.25x = 41 - 24
4.25x = 17
x = 17 / 4.25
x = 4 months
In conclusion, their costs would be the same in the 4th month.
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The population of a town increased by 15% in 2016, and decreased by 5% in 2017. If the population of the town was 60,000 in the beginning of 2016, then what was it at the end of 2017?
Answer:
65550 is the population at the end of 2017
Step-by-step explanation:
Population at the beginning of 2106: 60000
Increased 15% in 2016
Increase = 60000*.15 = 9000
New population = 60000+9000 = 69000
The population at the beginning of 2017: 69000
Decrease by 5% in 2017
Decrease 69000*.05 = 69000*.05 = 3450
New population = 69000-3450=65550
The population at the end of 2017 is 65550
estimate 8 2/9- 3 6/7
Answer:
4
Step-by-step explanation:
8 2/9 is close to 8
3 6/7 is close to 4
8 2/9 - 3 6/7 is close to 8-4 = 4
My estimate is 4
Identify the sampling method.
You want to determine the number of text messages students at your school send in a month. You randomly ask 10 students from each grade.
A.) random
B.) systematic
C.) stratified
D.) none of these
You want to determine the number of text messages students at your school send in a month. You randomly ask 10 students from each grade.
This is a random sampling method.
This sampling method is a basic sampling method where we select a group of subjects (a sample) for study from a larger group or population. Each individual is chosen entirely by chance. Each member of the population has an equal chance of being included in the sample.
Answer:
answer is pretty much in the last sentance lol. random
Step-by-step explanation:
(3a^2)^3 in simplest form
Answer:
27 ^6
Step-by-step explanation:
The first step is to split the expression into 2 parts (ab)^x = a^x b^x
(3a^2)^3
3^3 a^2 ^3
27 a^2^3
We can then us the power of power rule to simplify the exponents x^a^b = x^(ab)
27 a^(2*3)
27 ^6
Between 2005 and 2010, the average rate of inflation was about 2.7% per year. If a cart of groceries cost $190 in 2005. What did it cost in 2010?
Answer:
$217.07
Step-by-step explanation:
Each year, the cost of the groceries was multiplied by 100% +2.7% = 1.027. Doing this multiplication for 5 years result in a multiplying facor of ...
... 1.027^5
so the cost of the groceries after 5 years is ...
... $190.00 × 1.027^5 ≈ $217.07
Prove that for any value of x the value of the expression x^4–(x^2–7)(x^2+7) is equal to 49.
Multiplying it out using the distributive property, you have ...
... x^4 -(x^4 -7x^2 +7x^2 -49)
... = x^4 -x^4 +7x^2 -7x^2 +49 . . . . distribute the minus sign
... = x^4(1 -1) +x^2(7 -7) +49 . . . . . . collect like terms
... = 0 +0 + 49 . . . . . . . . . . . . . . . . . .simplify
... = 49
Solve the equaton for x.
3x = -4y
A. x = -12y
B. x = -12/y
C. x = -3/4y
D. x = -4y/3
3x = -4y
To solve for X, divide both sides by 3:
x = -4y / 3
The answer is D.
convert fractions to a fraction out of 100.
15/60=?
30/60=?
25/75=?
The numerator can be found by multiplying each of these fractions by 100. It can be helpful to reduce these fractions first.
Here, we calculate those numerators.
a) 15/60 · 100 = 1/4 · 100 = 100/4 = 25
b) 30/60 · 100 = 1/2 · 100 = 100/2 = 50
c) 25/75 · 100 = 1/3 · 100 = 100/3 = 33 1/3
Of course, the denominator is 100, so the fractions are ...
... 15/60 = 25/100
... 30/60 = 50/100
... 25/75 = (33 1/3)/100
_____
Comment on this solution
Effectively, we have multiplied each fraction by 1 = 100/100. That is ...
... fraction × (100/100) = (fraction × 100)/100
This changes the form, but not the value.
Either Table A or Table B shows a proportional relationship.
Table A:
x −2 −1 0 1
y 2 3 0 5
Table B:
x −1 0 1 2
y −3 0 3 6
nvm you dont have to answer this i just found out the answer
Answer:
Table B shows a proportional relationship.
Step-by-step explanation:
In a proportional relationship two quantities vary directly with each other. It means
[tex]y\propto x[/tex]
[tex]y=kx[/tex]
Where, k is the constant of variation.
The ordered pairs of table A are (-2,2), (-1,3), (0,0) and (1,5).
From these ordered pairs we can conclude that the value of y-coordinate is not changing according to the x-coordinate because the values of x increased by 1 for each ordered pair but the value of y is not increasing in the same proportion..
The ordered pairs of table B are (-1,-3), (0,0), (1,3) and (2,6). The value of y increasing at a constant rate 3 and the value of y-coordinate is 3 times of x-coordinate.
Choose any two ordered pairs of table B. Let the two points are (0,0) and (1,3), then the constant of variation is
[tex]k=\frac{y_2-y_1}{x_2-x_1}=\frac{3-0}{1-0}=3[/tex]
The proportional relationship is defined as
[tex]y=3x[/tex]
Therefore, 3 is the constant of variation and rate of change.
So, Table B shows a proportional relationship.
Answer:
Table B Shows proportional relationship.
Step-by-step explanation:
Correct answers are the green and yellow dots. Hope this helps. The red dot I got wrong.
If one card is drawn from a standard 52- card deck and not replaced, what is the probabity of getting an ace on the next draw?
Answer:
The probability is about 7.7%
Step-by-step explanation:
A probability is the ratio of the number of relevant outcomes and the number of all possible outcomes. To answer this question we do some counting first:
Consider two draws. We are interested in the second draw being an Ace, the first draw can either be an Ace or not, so, there are two cases of a relevant outcomes (all without replacement):
(number of relevant oucomes n ) = (number of cases of Ace-Ace draws) + (number of cases of NonAce-Ace draws):
[tex]n=4\cdot 3+{48\cdot4}= 204[/tex]
(number of possible outcomes) = (number of choices at first draw) * (number of choices at second draw) = 52 * 51 = 2652
The probability is then
P = 204/2652 = 0.0769, or about 7.7%
Someone please help me
Step-by-step explanation:
1. See the attachment for the filled-in diagram. Adding the contents of the figure gives the sum at the bottom, matching selection C.
2. If we let "d" represent the length of the second volyage, then the total length of the two voyages is ...
... (d+43) + d = 1003
... 2d = 960 . . . . . . . subtract 43
... d = 480 . . . . . . . . divide by 2
The second voyage lasted 480 days.
3. 1.9% - 1.9/100 = 0.019. Adding this fraction to the original means the original is multiplied by 1 +0.019 = 1.019. Doing this multiplication each year for t years means the multiplier is (1.019)^t.
Since the starting value (in 1975) is 4 (billion), the population t years after that is ...
... P(t) = 4(1.019)^t
if a polynomial function f(x)has root -2 + square root 8 and 9 what must be a factor of f(x)
The polynomial function f(x) having roots [tex]-2 + \sqrt(8)[/tex] and 9 would have factors [tex](x + 2 - 2\times \sqrt(2))[/tex] and (x - 9). These roots can be determined by setting the known values equal to x and subtracting from x.
Explanation:In mathematics, specifically in polynomial functions, the roots of a function are values that make the function equal to zero. These roots correspond to the factors of the polynomial function. If a function f(x) has roots -2 + square root 8 and 9, then the factors of f(x) will be those values set equal to x and then subtracted from x.
Therefore, the corresponding factors would be [tex]x - (-2 + \sqrt{8})[/tex] and (x - 9). When you simplify these, they become [tex](x + 2 - \sqrt(8))[/tex] and (x - 9). To further simplify, we know that [tex]\sqrt(8) = 2\times \sqrt(2),[/tex] therefore we get [tex](x + 2 - 2\times \sqrt(2))[/tex] and (x - 9).
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If a polynomial function has roots -2 + Square root 8 and 9, then x - (-2 + Square root 8) and x - 9 must be factors of the polynomial.
Explanation:Polynomial functions are mathematical expressions comprising variables, coefficients, and non-negative integer exponents. They are used in various fields, including mathematics, physics, engineering, and computer science. They model relationships between variables, aiding in solving equations, analyzing data, and predicting outcomes in diverse applications.
If the polynomial function f(x) has roots -2 + Square root 8 and 9, then x - (-2 + Square root 8) and x - 9 must be factors of f(x). This is because if a number is a root of a polynomial, then the polynomial can be divided evenly by the corresponding linear factor.
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analyze the following pattern 1,2,5,10,17..... describe the pattern can someone help me with my apex
First differences start at 1 and increase by 2.
Step-by-step explanation:Whenever analyzing any sort of sequence, it is usually helpful to look at the differences between terms. Here, they are ...
... 1, 3, 5, 7
This set of numbers clearly increases by 2 from one to the next. That is, second differences are 2.
_____
When 2nd differences are constant, the pattern can be described by a 2nd-degree polynomial. In this case, that is
... n² -2n +2 . . . . for n = 1, 2, 3, ...
Answer:
Quadratic sequence with
nth term = n^2 - 2n + 2.
Step-by-step explanation:
1,2,5,10,17
The differences between terms are
1,3,5,7
and the second differences are
2,2,2
This is a quadratic sequence with first term n^2 ( where n = sequence number).
List the original sequence and the values of n^2:-
1 2 5 10 17
1 4 9 16 25
If we subtract the first list from the second we get
0 2 4 6 8 which is arithmetic with common difference 2 and first term 0
The nth term of this is 2(n - 1)
So the explicit formula for the nth term of the original sequence is
n^2 - 2(n - 1)
= n^2 - 2n + 2
The average age of six children is 13 years and 5 months. a seventh child joins the group, increasing the average age by two months. how old is this seventh child
idk
Answer:
14 years 7 months
Step-by-step explanation:
If the average age was increased by 2 months by adding a 7th child, the total age was increased by 2·7 months = 14 months more than the previous average. That is, the added child's age is 14 months more than the previous average, so is ...
... (13 years + 5 months) + (1 year + 2 months) = 14 years + 7 months
_____
For the non-believers:
The previous total of all ages was ...
... 6 × (13 years 5 months) = 80 years 6 months
The new total of all ages is ...
... 7 × (13 years 7 months) = 95 years 1 month
The amount added to the previous total is ...
... (95 1/12 - 80 6/12) years = 14 7/12 years = 14 years 7 months
To find the age of the seventh child, calculate the total age of the six children and the total age of all seven children.
Explanation:To solve this problem, we can use the concept of the average. Step 1: Calculate the total age of the six children by multiplying the average age (13 years and 5 months) by the number of children (6). Step 2: Calculate the total age of all seven children by multiplying the new average age (13 years and 7 months) by the total number of children (7). Step 3: Subtract the total age of the six children from the total age of all seven children to find the age of the seventh child.
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A small cruising ship that can hold up to 66 people provides three-day excursions to groups of 42 or more. If the group contains 42 people, each person pays $58. The cost per person for all members of the party is reduced by $1 for each person in excess of 42. Find the size of the group that maximizes income for the owners of the ship.
50 people
Step-by-step explanation:Let x represent the number of people on the cruise. The amount they each must pay is ...
... ($58 -(x -42)) = $100 -x
The revenue from the group is the product of the number of people and the amount each pays:
... r(x) = x·(100 -x)
This describes a downward-opeing parabola with zeros at x=0 and x=100. The vertex (maximum) will be found halfway between those zeros, at x=50.
A group size of 50 maximizes revenue from the cruise.
Explain your answer.
C. None of the above
Step-by-step explanation:It appears to me the average times for Ravens backs are lower (< 4.44 s) than those of Chiefs backs (< 4.48 s), so the Ravens are faster on average.
The spread of Ravens times is 4.30–4.57 s, whereas the spread of Chiefs times is 4.42–4.56. The Ravens clearly show a greater variation.
The offered choices suggest the Chiefs are faster on average (not true) and that the Chiefs have a greater variation (not true). Since both of these choices are incorrect, the only remaining suitable choice is None of the above.
A salesperson receives a 5% commission on the sale of each car. If the commission on a car is $490, what is the price of the car?
*Please Show Work*
Answer:
$9800
Step-by-step explanation:
commission = 5% × car price
20 × commission = 100% × car price . . . . . . multiply by 20
20 × $490 = car price = $9800 . . . . . . . . . . fill in given value of commission
The price of a car on which a salesperson earns a 5% commission of $490 is calculated by dividing the commission amount by the commission rate as a decimal (0.05), resulting in a car price of $9,800.
The question is asking to calculate the price of a car based on the commission earned by the salesperson. The salesperson receives a 5% commission on each sale and has earned $490 from the sale of one car.
To find the price of the car, we need to set up a simple equation. If 5% of the price results in a $490 commission, we need to divide the commission by the percentage rate expressed as a decimal.
The calculation will look as follows:
Convert the commission percentage to a decimal: 5% = 0.05.
Divide the commission earned by the decimal rate: $490 ÷ 0.05.
The result is the price of the car.
So, $490 ÷ 0.05 = $9,800.
Therefore, the price of the car is $9,800.
What is the least common multiple of the number 64, 16, 2, and 8?
Answer:
64
Step-by-step explanation:
Since 64 is a multiple of itself and of all the other numbers, the answer is 64.
Algebra 2 help!
What are the x and y intercepts of the equation?
Round the answers to the nearest hundredth.
y = log(12x + 7) - 3
Answer:
x-intercept: 82.75y-intercept: 2.15Step-by-step explanation:
A graphing calculator can show you the intercepts.
___
Or you can figure them out.
The y-intercept is where x=0, so is ...
y = log(12·0 +7) -3 = log(7) -3 ≈ -2.1549 ≈ -2.15
___
The x-intercept is where y = 0, so is ...
0 = log(12x +7) -3
3 = log(12x +7) . . . . . . add 3
10^3 = 12x +7 . . . . . . . take the antilog
993 = 12x . . . . . . . . . . subtract 7
993/12 = x = 82.75 . . . divide by the coefficient of x
Kayla ran L laps around a 14-mile track. The equation d = 0.25L gives the number of miles she ran. If d is 1.5, which statement does NOT describe what L is?
A. The unknown in the equation.
B. The number of laps Kayla ran.
C. The length of one lap.
D. The number of laps needed to run 112 miles.
Answer:
C. The length of one lap.
Step-by-step explanation:
In the first four words, the problem statement tells you that L is the number of laps run. It is not the length of one lap.
_____
Comment on the problem presentation
Appropriate punctuation would be very helpful. Apparently, it is a 1/4-mile track, not a 14-mile track. Apparently, the distance is 1 1/2 miles, not 112 miles. Copying and pasting problem text often leaves out the special symbols used on some web sites. Some editing is usually needed.
identifying equation in point slope form for the line perpendicular to y equals negative 1 / 3x - 6 that passes through -1,5
Answer:
y = 3x +8
Step-by-step explanation:
The slope of the given line is -1/3. The slope of a perpendicular line is the opposite of the reciprocal of that: -1/(-1/3) = 3.
Then, in point-slope form, the equation of the line is ...
... y - k = m(x - h) . . . . . for slope m through point (h, k)
... y - 5 = 3(x -(-1)) . . . . . for line of slope 3 through (-1, 5)
... y = 3x +8 . . . . . . . . . simplify
0.5x+7/8=5 solve for x
[tex]0.5x+\dfrac{7}{8}=5\qquad\text{multiply both sides by 8}\\\\4x+7=40\qquad\text{subtract 7 from both sides}\\\\4x=33\qquad\text{divide both sides by 4}\\\\\boxed{x=\dfrac{33}{4}\to x=8\dfrac{1}{4}}[/tex]
i will give brainlest thanks
Answer:
68
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you ...
... Tan = Opposite/Adjacent
For this geometry, this means ...
... tan(x°) = 5/2
Taking the inverse tangent, we can find x.
... x° = arctan(5/2) ≈ 68.199°
... x ≈ 68
Which expression below gives the average rate of change of the function g(x) = -x2 - 4x on the interval 6 ≤ x ≤ 8 ?
plsss
Answer:
the first selection (see below)
Step-by-step explanation:
The average rate of change (m) on the interval [x1, x2] is given by ...
... m = (g(x2) -g(x1))/(x2 -x1)
For g(x) = -x²-4x and (x1, x2) = (6, 8), the expression is the one attached.
Answer:
[tex]\frac{[-8^2 - 4(8)]- [-6^2 - 4(6)]}{8-6}[/tex]
Step-by-step explanation:
average rate of change of the function g(x) = -x^2 - 4x on the interval 6 ≤ x ≤ 8
To find average rate of change we use formula
Average =[tex]\frac{g(x_2)-g(x_1)}{x^2-x_1}[/tex]
use the given interval 6<=-x<=8
x2=8 and x1= 6
we replace the value in the given formula
g(x) = -x^2 - 4x
[tex]g(8) = -8^2 - 4(8)[/tex]
[tex]g(6) = -6^2 - 4(6)[/tex]
x2-x1 is 8-6
So equation becomes
[tex]\frac{[-8^2 - 4(8)]- [-6^2 - 4(6)]}{8-6}[/tex]
Help Now 5 points and will mark brainliest!!! On a trip to his grandparents, Donny drove 60 miles per hour for 45 minutes and 50 miles per hour for 30 minutes. How many miles did Donny drive? A) 55 miles B) 65 miles C) 70 miles D) 90 miles
If you travel at a constant speed, you follow this equation:
[tex] d = st [/tex]
where d is the distance, s is the speed and t is the time.
In this example, you first travel 60 miles per hour for 45 minutes. Since 45 minutes are 3/4 of a hour, you will cover a distance of
[tex] d_1 = 60\cdot\dfrac{3}{4} = 45 [/tex]
In the second part, since 30 minutes is half a hour, you will cover a distance of
[tex] d_2 = 50\cdot\dfrac{1}{2}=25 [/tex]
So, in total, you travel
[tex] d=d_1+d_2=45+25 = 70 [/tex] miles
Answer:
C-70 miles
Hope this helped :)
Given f '(x) = (x − 4)(6 − 2x), find the x-coordinate for the relative minimum on the graph of f(x).
Answer:
x = 3
Step-by-step explanation:
f'(x) = 0 for x = 3 and x = 4 . . . . by the zero product rule.
The coefficient of x² in f'(x) is negative, so the parabola opens downward.
f''(x) is positive for x < 3.5, so the coordinate x = 3 represents a relative minimum.
Max wants to know if the following is correct.3+5=6+2. Draw and write to tell how you know.
Answer:
Yes
Step-by-step explanation:
3+5 is 8 and 6+2 is also 8. You can draw 3 apples with 5 other apples, and count that there are 8 of them and draw 6 apples with 2 other apples that make up 8 apples. Or you can rearrange the apples to be 5 and 3 and 6 and 2.