The Ridgeport school district collected data about class size in the district. The table shows the class for sizes five randomly selected Kindergarten and seventh-grade classes.

Answer:

  (b)  y = 4x +15; y = 10x -2

Step-by-step explanation:

It is often sufficient to check for reasonableness in the offered answers. That is the case here.

__

The offered answer choices differ in the combinations of slope. The offered slopes (x-coefficients) are 4 or 1/4, 10 or 1/10, so it is sufficient to determine if the slope is greater than 1 in each case.

The slope is the ratio of the change in y to the change in x. It will be greater than 1 if y changes by a larger number than x does.

x-values in this table change by 4-2 = 2. y-values change by 31 -23 = 8, which is more than 2. The slope is greater than 1 for the first equation. (It is 8/2 = 4.)

The first two x-values in this table differ by 0-(-1) = 1. The first two y-values differ by -2-(-12) = 10, which is more than 1. The slope is also greater than 1 for the second equation. (It is 10/1 = 10.)

The x-coefficients in the answer choices are ...

  a) 1/14, 1/10 . . . incorrect

  b) 4, 10 . . . . correct

  c) 1/4, 10 . . . . partly correct

  d) 4, 1/10 . . . . partly correct

Answer:

-6

Step-by-step explanation:

6a - 5 = 7 + 8a

6a - 8a = 7 + 5

-2a = 12

a = 12/-2

a = -6

Hope it helps:)

Answer:

I think it's 9156.24 but it's been a long time since I did this

Answer:

9,156.24

divide the 108/2 to get the radius

108/2=54

square 54

54x54=2916

multipy that by 3.14

3.14x2,916=9,156.24

Answer:

X = 114:)

Step-by-step explanation:

have you smiled today? its very important:)

Answer:

V≈83.78

Step-by-step explanation:

The formula to find the volume of a cone is V=πr(squared) h/3

Steps

V= π (4)^2  5/3

V= π (16)  1.66666666667

V = 50.2654824574 * 1.66666666667

v= 83.7758040958

Round

V = 83.78

Answer:

The volume of cone is 83.73m³.

Step-by-step explanation:

To find the volume of the cone we use Formula:

[tex] \sf V = \frac{1}{3} \pi {r}^{2} h \\ \\ \implies \: \frac{1}{3} \times 3.14 \times {4}^{2} \times 5 \\ \\ \implies \frac{1}{3} \times 15.70\times 16 \\ \\ \implies \: \frac{1}{ \cancel3} \times \cancel{251.20} \\ \\ \implies \sf \pink{83.73 {m}^{3} }[/tex]

Hence, the volume of cone is 83.73m³.

Answer:

C

Step-by-step explanation:

There are 140 women in the 5% sample. to find an estimate of all the women we can multiply but by 20. 5% x 20 = 100%. 140 x 20 = 2,800.

1. No

She needs $15.44 to complete the purchase.

2. Yes

If she uses the coupon then she will have her stuff and $14.56 left.

Hope this help please give brainliest

Step-by-step explanation

Answer:

199.51$

Step-by-step explanation:

10 x 12 = 120$

25 x 5 = 125$

5 x 8 = 40¢

1 x 11 = 11¢

30 + 50 = 80$

120$ + 125$ + 40¢ + 11¢ + 80$ = 325.51$

325.51$ - 44$ = 281.51$ - 25$ = 256.51$ - 12$ = 244.51$ - 15$ = 229.51$ - 30$ = 199.51$

Answer:

Distance of Tunnel is 500 meters + Train travel rate is 20 meters per second = 25 seconds to pass through the tunnel only therefore the outstanding balance of 35 seconds x 20 meters per second =600 meters Train

Step-by-step explanation:

Total of length of train 600 meters and tunnel (500 meters) is 1,200 meters +30 seconds = TR of 20 meters per second

Answer:

Step-by-step explanation:

We multiply 4/5 times 3/1 to find how many miles the penguins swam in one hour.

4 x 3/5 x 1

12/5

The penguins swam 12/5, or 2 and 2/5 miles in one hour.

Table:

Miles     4/5        12/5

Hours    1/3           1

Answer:

We multiply 4/5 times 3/1 to find how many miles the penguins swam in one hour.

4 x 3/5 x 1

12/5

The penguins swam 12/5, or 2 and 2/5 miles in one hour

Step-by-step explanation:

brainliest please

Answer:

the guy above me is correct

Step-by-step explanation:

Mark him brainliest

Answer:

I cant answer with no picture

Step-by-step explanation:

0.000001

10^-6

hope this helps :))

Answer:

1/12

Step-by-step equation

Since your spinning a spinner twice which has a chance of landing on any number with a 1/6 chance spinning a number than q would give you a 1/12 chance. Another equation would be 1/6 * 2

Answer:

mode = 88

Step-by-step explanation:

Mode means the number that repeats the most. Out of all the numbers, 88 repeats itself three times in the set of data while all the numbers are there once or twice.

Answer:

3x+4y=7.25

Step-by-step explanation:

according to the 1st equation, the number of pickle is 'x', and number of bag is 'y'.

Then the 2d equation is 3x+4y=7.25

Answer:

the MAD to this set is 6.75

Step-by-step explanation:

The process is pretty long on how to find the MAD but here it goes.First you find the mean of the set( 70 )then you find the distances between all the numbers and the mean( 68 is 2 values away from being 70 so that would be 2) than you add all the distances together than divide that number by the amount of values are in the set.

hope that makes sense have a good day

Answer:

I think it might be D

Step-by-step explanation:

brainliest please

Answer:

15ft

Step-by-step explanation:

Answer:

1. 5

2. 12

3. 3.5

Step-by-step explanation:

Answer:

1. r = 5

2. r = 12

3. r = 3.5

Step-by-step explanation:

Explanation in pic

I hope this helped

Stay Safe!

Answer:

4. Multiply both sides by -2 => x - 7 = -36, Add 7 to both sides -> x = -29

5. Add 12 to both sides => 28 = 1/4x, then multiply both sides by 4 => 112

x = 112

7. Multiply both sides by 3 => 5x - 2 = 63, add 2 to both sides => 5x = 65,

Divide both sides by 5 -> x = 13

10. Multiply both sides by 6 => 132 = 3x - 6, Add 6 to both sides => 138 = 3x,

Divide both sides by 3 => x = 46

Step-by-step explanation:

Answer:

84 months

Step-by-step explanation:

Maria is 7 years old, there are 12 months in a year, multiply 12 by 7.

12 * 7 = 84

Maria is 84 months old

Answer:

Maria is 84 months old.

Multiply the years(y) by every 12 months that pass(m).

[tex]y * m = 84[/tex]

note that y is 7, and m is 12, because we count every 12 months that pass for 7 years.

If each side of the case is three times longer than the width of the pyramid that means we would do (wx3)^3 as to find the volume of a perfect cube we do to the power of 3.

Answer:

A and C are congruent.

Step-by-step explanation:

Answer:

The trapezoids and the irregular figures at the top left.

Step-by-step explanation:

Congruent means "in agreement or harmony." So that means in math congruent means "the same" and the trapeziods were both the same and so were the irregular figures.

Answer: hii :)

Step-by-step explanation:

Evaluate using scientific notation.

Hopefully this helps you

- Matthew

Answer:

I believe it's the first one

Answer:

The First one and the third one

Step-by-step explanation:

All you have to do is the distributive property and multiply 7 times 3x and 7 times 2 to get 21x + 14. Then you add like terms for the third one and get x2+5.

Do this help? :)

Answer: 20

Step-by-step explanation:  1 decameter has 10 meters so if he has 2 decameter long ribbons than it would be 20 meters.