WILL GIVE BRAINLIST!!!!!!!!!!!!!! A group of students were surveyed to find out if they like working as a camp counselor and/or as a lifeguard during summer break. The results of the survey are shown below:
32 students like working as a camp counselor
8 students like working as a camp counselor but do not like working as a lifeguard
29 students like working as a lifeguard
8 students do not like working as a lifeguard or a camp counselor
Four students created the tables below to represent the data. CC represents camp counselor and LG represents lifeguard.
Which student's table is correct?
Answers
Answer:
I think Table C - Corralle
Answer:
c
Step-by-step explanation:
Related Questions
To which graph does the point (2, 4) belong?
y ≥ x + 3
y ≥ −x + 8
y ≥ 4x − 5
y ≥ −2x + 9
Answers
Answer:
Option (3) is correct.
(2,4) belongs to y ≥ 4x - 5
Step-by-step explanation:
Given : the point (2,4)
We have to find the equation of graph to which the point (2,4) belongs.
We will substitute the point in the each given equation and for which the point satisfies will contain the point.
For 1) y ≥ x + 3
Put x = 2 and y = 4
⇒ 4 ≥ 2 + 3
⇒ 4 ≥ 5 (false)
For 2) y ≥ -x + 8
Put x = 2 and y = 4
⇒ 4 ≥ -2 + 8
⇒ 4 ≥ 6 (false)
For 3) y ≥ 4x - 5
Put x = 2 and y = 4
⇒ 4 ≥ 4(2) - 5 = 8 - 5
⇒ 4 ≥ 3 (true)
For 4) y ≥ -2x + 9
Put x = 2 and y = 4
⇒ 4 ≥ -4 + 9
⇒ 4 ≥ 5 (false)
Since, the point (2,4) satisfies only inequality y ≥ 4x - 5.
Thus, (2,4) belongs to y ≥ 4x - 5
Prove abcd is a parallelogram
Answers
Since both pairs of opposite sides of quadrilateral ABCD are parallel and equal, by definition, ABCD is a parallelogram.
Given that in quadrilateral ABCD, side AD is equal to side BC (AD = BC) and side AD is parallel to side BC (AD || BC), we can use these properties to prove that ABCD is a parallelogram.
Here is a step-by-step proof:
1. Definition of a parallelogram: A quadrilateral is a parallelogram if both pairs of opposite sides are parallel.
2. Given: AD = BC (opposite sides are equal) and AD || BC (opposite sides are parallel).
3. To Prove: AB || CD and AB = CD (the other pair of opposite sides are also parallel and equal).
4. Proof:
- Since AD = BC and AD || BC, we have one pair of opposite sides that are equal and parallel.
- In a quadrilateral, if one pair of opposite sides is equal and parallel, the quadrilateral is a parallelogram (This is a theorem in Euclidean geometry).
- Therefore, AB must be parallel to CD (AB || CD) because the opposite sides of a parallelogram are parallel by definition.
- Also, in a parallelogram, opposite sides are equal (another property of parallelograms), so we can conclude that AB = CD.
5. **Conclusion**: Since both pairs of opposite sides of quadrilateral ABCD are parallel and equal, by definition, ABCD is a parallelogram.
This logical sequence uses the properties of parallelograms and the given information to prove that ABCD must be a parallelogram.
geometry help! this is my 2nd to last question
Answers
Your answer would be d. square. Rhombus have actute angles, squares have right angles. It's clearly not a rectangle (as the sides are all the same) so it has to be square.
I hope I helped and if you need more you could always ask me :)
-Dawn
A librarian randomly selects 25 returned books one day and finds that three of them were returned late. based on this sample, how many of the 410 returned books that day are likely to be late returns?
Answers
Approx. 49 books.
Which situation involves descriptive statistics?
A) The food cans have a mean shelf life of 14 months.
B) The study estimates that 10% of the fish died as a result of the drought.
C) According to a poll, about 12% of our customers have returned at least one item. D) The sample indicates that the mean weight of all the boxes is 3.3 kg.
Answers
The descriptive Statistics are used to introduce quantitative depictions in a sensible shape. In an examination contemplate we may have several number of measures. Or, then again we may quantify countless on any measure. Clear measurements with descriptive statistics help us to simplify a lot of information sensible manner.
so the answers are
A) The food cans have a mean shelf life of 14 months.
D) The sample indicates that the mean weight of all the boxes is 3.3 kg.
Answer:
The correct answer is:
A) The food cans have a mean shelf life of 14 months.
Just took this quiz and this was the correct answer.
Step-by-step explanation:
How many liters of a 25 percent saline solution must be added to 3 liters of a 10 percent saline solution to obtain a 15 percent saline solution?
Answers
So we are going to mix x liters (25% saline) and and 3 liters (10% saline).
In total we are going to have a x+3 litters (of 15% saline).
a. of the x liters, 25/100x=0.25x is saline. so we have 0.25x liters saline.
b. of the 3 liters, (10/100)*3=0.1*3=0.3 liters is saline.
c. of the x+3 liters, (15/100)(x+3)=0.15(x+3)=0.15x + 0.45 liters is saline
equalize:
0.25x + 0.3 = 0.15x + 0.45
0.25x - 0.15x = 0.45 - 0.3
0.1 x =0.15
x=0.15/0.1= 1.5 (liters)
Answer: 1.5 liters
Final answer:
To achieve a 15 percent saline solution by mixing a 10 percent solution with a 25 percent solution, we calculate that we need to add 1.5 liters of the 25 percent saline solution to the initial 3 liters of the 10 percent solution.
Explanation:
To solve the problem, we need to calculate how much of a 25 percent saline solution should be added to 3 liters of a 10 percent saline solution to get a 15 percent saline solution. We'll use the concept of the conservation of mass of the solute (NaCl) and set up an equation to find the required volume of the 25 percent solution.
Let V be the volume of the 25 percent solution we need to add. The amount of NaCl in the 10 percent solution is (0.10)(3 L), and the amount of NaCl in the 25 percent solution is (0.25)(V). The resulting solution has a concentration of 15 percent, so the amount of NaCl in the final solution will be (0.15)(3 L + V).
Now we set up our equation based on the mass of NaCl being equal before and after the addition of the 25 percent solution:
(0.10)(3 L) + (0.25)(V) = (0.15)(3 L + V)
Solving this equation:
0.30 + 0.25V = 0.45 + 0.15V
0.25V - 0.15V = 0.45 - 0.30
0.10V = 0.15
V = 0.15 / 0.10
V = 1.5 L
Therefore, 1.5 liters of a 25 percent saline solution must be added to the initial 3 liters of a 10 percent solution to obtain a 15 percent saline solution.
Solve the linear equation:
3.4 + 2(9.7 – 4.8x) = 61.2
Answers
steps:
subtract 3.4 from both sides
simplify
divide both sides by 2
subtract 9.7 from both sides
simplify again
divide both sides by -4.8
simplify once more
Write the standard form of the line that has a slope of - and y-intercept of -2. Include your work in your final answer. Type your answer in the box provided or use the upload option to submit your solution.
Answers
slope-intercept form of your provided values:
[tex]y=-x-2[/tex]
now, solve for x and y
[tex]x+y=-2[/tex]
Your answer is [tex]x+y=-2[/tex].
y = mx + b where m=slope and b = y-intercept
so here we have
y = -x - 2
standard form is x + y = -2
10(2y+2)−y=2(8y−8)
y= ???
Answers
- distribute the 10 into (2y+2)
- distribute 2 into (8y-8)
You will have 20y +20 - y = 16y - 16
- bring the 20 to the other side to get
20y - y = 16y - 36
- subtract y from 2y to get 19y = 16y -36
- bring 16y to the other side to get 3y = -36
- divide 3 from both sides to single out y.
Your final answer is y = -12
20y + 20 - y = 16y - 16
19y - 16y = -16 - 20
3y = -36
y = -36/3
y = -12
Find the GCF. 18x 3 and 30x 5
A.
6x 5
B.
90x 3
C.
6x 3
D.
90x 5
Answers
To find the GCF, first look at ur coefficients....The GCF of ur coefficients (18 and 30) is 6
now look at ur variables....pick the one with the lowest exponent...that would be x^3
so the GCF of these 2 terms is : 6x^3
Justin is a software salesman. his base salary is $1500 , and he makes an additional $40 for every copy of english is fun he sells. let p represent his total pay (in dollars), and let n represent the number of copies of english is fun he sells. write an equation relating p to n . then use this equation to find his total pay if he sells 23 copies of english is fun.
Answers
n = number of copies
P = 1,500 + 40n
Therefore, if Justin sells 23 copies, his total pay will be:
P = 1,500 + 40(23)
P = $2,420
Simplify this problem please
Answers
9x⁴y⁴ / 3y²
Then get rid of the denominator using 9/3=3 and y⁴/y² = y²
3x⁴y² is the simplest form.
What price do farmers get for the peach crops? in the third week of June, a random sample of 40 farming regions gave a sample mean of $6.88 per basket. assume that the standard deviation is known to be $1.92 per basket. find a 90% confidence interval for the population mean price per basket that farmers in this region get for their peach crop.
Answers
n = 40, sample size
xb = $6.88, sample mean
σ = $1.92, population standard deviation
At 90% confidence interval, the expected range is
[tex](xb - 1.645 \frac{ \sigma }{ \sqrt{n}} ,\, xb + 1.645 \frac{ \sigma }{ \sqrt{n} } )[/tex]
= [ 6.88 - 1.645*(1.92/√40), 6.88 + 1.645*(1.92/√40)]
= (6.38, 7.38)
Answer:
The 90% confidence interval is ($6.38, $7.38)
In a given quadrilateral, each side is parallel to its opposite side and the diagonals are not perpendicular. What could it be? Check all that apply.
A. Square
B. Parallelogram
C. Rhombus
D. Rectangle
Answers
The answers are D:Rectangle, and B:Parallelogram
A collection of quarters and nickels contains at least 42 coins and is worth at most $8.00. If the collection contains 25 quarters, how many nickels can be in the collection?
Answers
The total number of nickels that can be collected is 17 and this can be determined by forming the inequality.
Given :
A collection of quarters and nickels contains at least 42 coins and is worth at most $8.00.
The inequality can be formed in order to determine the total number of nickels that can be collected.
Let the total number of quarters be 'x' and the total number of nickels be 'y'. Then the inequality that represents the total number of quarters and nickels contained in the collection is at least 42 is given by:
x + y [tex]\geq[/tex] 42 --- (1)
The inequality that represents that the worth of the coins is at most $8 is given by:
0.25x + 0.5y [tex]\leq[/tex] 8 --- (2)
Now, according to the given data there are a total of 25 quarters in the collection, so, the number of nickels contained in the collection is:
x + y [tex]\geq[/tex] 42
25 + y [tex]\geq[/tex] 42
y [tex]\geq[/tex] 17
So, the total number of nickels that can be collected is 17.
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The collection can contain up to 35 nickels, given that it already includes 25 quarters and the total value does not exceed $8.00.
Explanation:To determine how many nickels can be in the collection, we must first calculate the total value of the 25 quarters. Since each quarter is worth 25 cents, we multiply 25 quarters by 25 cents to get 625 cents, which is $6.25. The maximum value of the entire collection is $8.00. Thus, we subtract $6.25 from $8.00 to find the remaining value that can be occupied by nickels, which is $1.75. Each nickel is worth 5 cents, so we divide $1.75 by 0.05 (5 cents) to find the maximum number of nickels. $1.75 divided by 0.05 equals 35. Therefore, the collection can contain up to 35 nickels.
If 1,000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in less than 40 minutes?
Answers
Answer:
500
Step-by-step explanation:
It is expected that approximately 500 students would finish the test in less than 40 minutes.
To determine the number of students who would be expected to finish the test in less than 40 minutes, we can use the concept of the standard normal distribution and the z-score.
The z-score measures the number of standard deviations an individual data point is from the mean. In this case, we want to find the proportion of students who finish the test in less than 40 minutes, which corresponds to finding the area under the curve to the left of the mean.
Using the z-score formula:
z = (x - μ) / σ
where x is the value (40 minutes), μ is the mean (40 minutes), and σ is the standard deviation (8 minutes).
Substituting the values into the formula:
z = (40 - 40) / 8
z = 0
A z-score of 0 indicates that the value is exactly at the mean.
Since we are interested in the proportion of students finishing in less than 40 minutes, we need to find the area under the curve to the left of the mean, which is represented by a z-score of 0.
By referring to a standard normal distribution table or using a statistical software, we find that the proportion of students finishing in less than 40 minutes is approximately 0.5000.
To find the expected number of students, we multiply the proportion by the total number of students:
Expected number of students = 0.5000 * 1000 = 500
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what is the circumference of a circle with a radius of 39
Answers
The formula for finding circumference is C = 2[tex] \pi [/tex]r
[tex]C = 2 \pi r C = 2 \pi 39 C = 78 \pi [/tex]
The graph below shows the value of Edna's profits f(t), in dollars, after t months:
graph of quadratic function f of t having x intercepts at 6, 0 and 18, 0, vertex at 12, negative 36, and passes through point 21, 41.25
What is the closest approximate average rate of change for Edna's profits from the 18th month to the 21st month?
a. Three dollars per month
b. Nine dollars per month
c. 13.75 dollars per month
d. 41.25 dollars per month
Answers
( y 2 - y 1 ) / ( x 2 - x 1 )
We have to find the average rate of change from the 18th month to the 21st month. So: y2 = 41.25, y 1 = 0, x 2 = 21, x 1 = 18;
( 41.25 - 0 ) / ( 21 - 18 ) = 41.25 / 3 = 13.75
Answer:
c. 13.75 dollars per month.
Answer:
C) 13.75 dollars per month
Step-by-step explanation:
i took the test and got it right
NEED HELP PLEASE!!!!
The diameter of a hydrogen atom is about 5×10^-15 meter. Suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. Multiply these numbers to find the length of this line of atoms. What is the length in scientific notation?
Select one:
a. 4.2×10^−2 meter
b. 0.042 meter
c. 42×10^−3 meter
d. 4.2×10^−3meter
Answers
Answer:
I'm a few years late, lol, but um the answer is 42 x [tex]10^{-3}[/tex] meters
For all the people who still need the answer.
Step-by-step explanation:
5 x [tex]10^{-11}[/tex] and 8.4 x [tex]10^{8}[/tex]
5 x 8.4 = 42 (multiply like terms)
[tex]10^{-11}[/tex] + [tex]10^{8}[/tex] = [tex]10^{-3}[/tex] (add the exponents)
42 x [tex]10^{-3}[/tex]
The length in scientific notation is [tex]42\times10^{-7[/tex] meter.
What is scientific notation?Scientific notation is a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power such as [tex]1.56\times10^7[/tex].
Given that, the diameter of a hydrogen atom is about [tex]5\times10^{-15}[/tex] meter. Suppose 8.4×10⁸ hydrogen atoms were arranged side by side in a straight line.
Now, multiply the numbers
[tex]5\times10^{-15}[/tex]×8.4×10⁸
= [tex]42\times10^{-7[/tex] meter
Therefore, the length in scientific notation is [tex]42\times10^{-7[/tex] meter.
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Rationalize the denominator of sqrt of -49 over (7-2i)-(4+9i)
Answers
-49/[(7-2i)-(4+9i)
=-49/[7-4-2i+9i]
=-49/[3+7i]
to rationalize the denominator we multiply both the numerator and the denominator by [3-7i]
hence;
-49/[3+7i]*[3-7i]/[3-7i]
=[-49(3-7i]/(9+49]
=(-147+343i)/58
The answer is (-147+343i)/58
For the graph y= 1 find the slope of a line that is perpendicular to it and the slope of a line parallel to it. Explain your answer with two or more sentences
Answers
Answer:
Parallel: [tex]m = 0[/tex] (Horizontal), Perpendicular: [tex]m = -\frac{1}{0}[/tex] (Vertical)
Step-by-step explanation:
The equation y = 1 is an horizontal straight line ([tex]y = 0\cdot x + 1[/tex]). The slope of a line parallel to it is [tex]m = 0[/tex]. The slope of line perpendicular to it is [tex]m = -\frac{1}{0}[/tex], since slope is represented by tangent function, which is undefined at [tex]\theta = \pm 0.5\pi[/tex].
If tan x° = 11 divided by r and cos x° = r divided by s, what is the value of sin x°?
Answers
Answer:
[tex]sin x = \frac{11}{s}[/tex]
Step-by-step explanation:
[tex]Tan x = \frac{11}{r}[/tex]
[tex]Cos x = \frac{r}{s}[/tex]
Property : [tex]\frac{sin \theta}{cos \theta}=Tan \theta[/tex]
So, [tex]\frac{sinx}{cosx}=Tan x[/tex]
Substitute the values
[tex]\frac{sinx}{ \frac{r}{s}}=\frac{11}{r}[/tex]
[tex]sinx =\frac{11}{r} \times \frac{r}{s}[/tex]
[tex]sinx =\frac{11}{s}[/tex]
Hence the value of sin x° is [tex]\frac{11}{s}[/tex]
The mean is defined as the
Answers
hope this helps:)
Carmen is going to roll an 8-sided die 200 times. She predicts that she will roll a multiple of 4 twenty-five times. Based on the theoretical probability, which best describes Carmen’s prediction?
Answers
multiple of 4 ={4,8} = 2 favorable outcomes:
P(4 OR 8) = 2/8 = 1/4
Expected values after 200 rolls:
200 x P(4 or 8) = 200 x 1/4 = 50
The prediction is 50
Answer:
Carmen's prediction is low because 200 times is 50.
Step-by-step explanation:
First of all we are going to define the sample space for this exercise.
The sample space is Ω = {1,2,3,4,5,6,7,8}
Given the event A : ''Roll an 8-sided die an get a multiple of 4''
The probability for the event A is
Because they are two numbers (4 and 8) over a total of eight numbers (1,2,3,4,5,6,7,8) that are multiple of 4.
Now, given the random variable X : ''Total of numbers multiples of 4 If she rolls
an 8-sided die 200 times''
X can be modeled as a Binomial random variable.
X ~ Bi (n,p)
X ~ Bi (200,)
In which n is the total times she rolls the 8-sided die and p is the success probability. We define a success as obtain a number multiple of 4.
The mean for this variable is
We answer that Carmen's prediction is low because 200 times is 50.
Students were asked to measure a string as part of a physics experiment. The actual length of the string was 7.35 cm long. Which of the following groups of data show measurements from the most accurate group and why?
7.35 cm, 7.82 cm, 7.12 cm, because one of the measurements is closest to the actual length.
6.95 cm, 6.93 cm, 6.97 cm, because these have the most agreement between the measurements.
7.32 cm, 7.37 cm, 7.39 cm, because this group’s measurements are closest to the actual length. - My answer
7.90 cm, 7.91 cm, 7.89 cm, because these have the most agreement between the measurements.
Answers
Data set 1:
Mean= (7.35+7.82+7.12) ÷ 3 = 7.43
Data set 2:
Mean = (6.95+6.93+6.97) ÷ 3 = 6.95
Data set 3:
Mean = (7.32+7.37+7.39) ÷ 3 = 7.36
Data set 4:
Mean = (7.90+7.91+7.89) ÷ 3 = 7.9
From our calculation, the closest mean value to the actual length is data set 3, hence the data set 7.32, 7.37, 7.39 is the most accurate group
Identify the reflection of the figure with vertices
Answers
the x coordinate will stay the same but y coordinate will change sign
for example ( 2, -4) will reflect to 2 , 4)
Check out option B
Iliana was part of a group that was working on changing 0.4 repeated to a fraction. Each member of the group had a different answer. Which answer is correct?
Answers
[tex]\bf \textit{but we know }x=0.444444444\overline{4} \textit{ so then }4+0.444444444\overline{4}=\boxed{4+x} \\\\\\ \textit{wait a second! }10\cdot x\implies 10x=4.444444444\overline{4}=4+x \\\\\\ thus\qquad 10x=4+x\implies 10x-x=4\implies 9x=4\implies \boxed{x=\cfrac{4}{9}}[/tex]
you can check in your calculator.
anyhow, to get the "recurring decimal to fraction", you start by setting to some variable, "x" in this case, then move the repeating part to the left of the point by multiplying it by some power of 10, and then do the equating.
Iliana was part of a group that was working on changing 0.4 repeated to a fraction. The answer is 2.25.
How to convert percent to fraction and decimal?Percentage counts the number compared to 100.
So, if we have a%, that means for each 100, there are 'a' parts. If we divide each of them with 100, we get:
For each 1, there are a/100 parts.
Iliana was part of a group that was working on changing 0.4 repeated to a fraction.
Each member of the group had a different answer.
Let x be 0.444444[tex]\bar 4[/tex]
So,
4 / 10 = 0.4
4 / 9 = 0.4444444...
9/ 4 = 2.25
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True or False
The geometric mean of 8 and 2 is 4.
Answers
TRUE IVE GOT IT WRONG ON MY ASSIGNMENT.
Answer:
True
Step-by-step explanation:
To find the geometric men you have to cross multiply the two given numbers and then find x squared for those numbers. So to find x squared you have to find the square root of the product from the two multiplied numbers.
8/x = x/2
8*2 = 16 = x squared
x= square root of 16 which equals 4
In the triangle below, what ratio represents cot θ?
Answers
cotα=1/tanα
cotα=12/9
cotα=4/3
Plugging in, we get that the cotangent of the indicated angle is [tex]$\frac{12}{9}=\frac{4}{3}$[/tex].
At a certain time of the day, a tree 15m tall casts a shadow of 12m, while a second tree casts a shadow of 20m. how tall is that?
Answers
so the ratio of the shadow sides is equal to the ratio of the tree sides. the 2 shadow sides are 12 and 20 so 12/20 is the ratio. one tree side is 15 and we will say the other is x so their ratio is 15/x.
since.the 2 ratios are equal we can say:
12/20 = 15/x
12x = 300
x = 25.
so the tree is 25m tall