Leo wants to determine the average number of texts middle school students send in a day. Since all middle school
students are enrolled in history, he randamly surveyed 4 'students from each of Mr. Barnes's eighth-grade history
classes. Ms. Lopez and Mrs. Frank also teach eighth-grade history. What should Leo do to ensure his sample is
representative of all middle school students?
O He should take the sample as is because he randomly surveyed students in each of Mr. Barnes's classes.
He should also take a sample from Ms. Lopez's and Mrs. Frank's classes so that each student has the same
chance of being chosen.
O He should also take a sample from each of the other history classes in all of the other grades in the middle school.
O He should survey al the students in all the history classes to make sure he collects enough data.
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Answer:

it represents how many each person gets

Answer:

Hello im pretty sure that the represents the friend prove me if im wrong

Step-by-step explanation:

Answer: 11 more i think

Step-by-step explanation:

Answer:

We can not see the image, so i will answer this in a general way.

We know that a linear equation can be written as:

y = a*x + b

Where a is the slope, and b is the y-intercept.

In this case, we know that this line has a slope equal to -2, then the line is:

y = -2*x + b

Now, suppose that in the image we can see that this line passes through the point (j, k)

Then we can replace x by j, and y by k in the line equation, to get:

k = -2*j + b

Now we can solve this for b:

b = k + 2*j

Then we can conclude that a line with a slope equal to -2, that passes through the point (j, k) is:

y = -2*x + (k + 2*j)

Answer:

14/27

Step-by-step explanation:

7/3 ÷ 9/2

7/3 x 2/9 = 14/27

Answer:

32

Step-by-step explanation:

First you're going to change 20% to a decimal which would be 0.20

Next, multiply .20 by 40

You should get 8

Subtract 8 from 40

You're answer is 32

Answer:

y = 16

x = 2

Step-by-step explanation:

y = 8x

y = 4x + 8

then, by substitution:

8x = 4x + 8

8x - 4x = 8

4x = 8

x = 8/4

x = 2

y = 8x

y = 8*2

y = 16

Check:

y = 4x + 8

y = 4*2 + 8

16 = 8 + 8

Answer:

-17

Step-by-step explanation:

-16r=272

16r=-272

r=-17

Answer:

r=(-17)

Step-by-step explanation:

-16r=272

/-16  /-16

r=(-17)

Answer:

multiply 6x10then by 20

Step-by-step explanation:

For a

Let the another angle be x then

x + 51° = 90° {being complementary angles }

x = 90° - 51°

x = 39°

For b

Let the another angle be x then

x + 113° = 180° {being supplementary angles }

x = 180° - 113°

x = 67°

Answer:

d

Step-by-step explanation:

all of the angles add up to equal 180 so we setup the equation as 45+3x=180

first you subtract each side by 45

135=3x

then you divide each side by 3 and get that

x=45

Answer:

D, 45°

Step-by-step explanation:

at [tex]x=45[/tex]

the resulting angles would be [tex]45, 90, 45[/tex] and these add up to [tex]180[/tex]°

Answer:

What are the other choices

Step-by-step explanation:

Answer:

(4,0) and (2,0)

Step-by-step explanation:

For an x-intercept, y=0, so now we have:

(x-4)(x-2)=0

Anything multiplied by 0 is 0, so (x-4)=0 and/or (x-2)=0

(x-4)=0

x=4

(x-2)=0

x=2

The x-intercept co-ordinates are: (4,0), (2,0)

Answer:

x-intercepts are (4,0) and (2,0)

Answers:

14 + 18 ÷ 2 x 18 – 7 = 169

60 – 9 x 8 ÷ 8 x 6 = 6

15 x 10 + 12 ÷ 3 + 9 = 163

(10 ÷ 5)3 + 100 – 9 x 11 = 7

8 x 4 + 9 – 9 + 18 = 50

3 x 8 x 2 – 42 + 5 = 11

i hope this helps, good luck :)

Answer:

Step-by-step explanation:

14 + 18 ÷ 2 x 18 – 7 = 169

14 + 9 * 18 - 7

14 + 162 - 7

169

60 – 9 x 8 ÷ 8 x 6 = 6

60 - 72 / 8 * 6

60 + -216/4

60 - 54

6

15 x 10 + 12 ÷ 3 + 9 = 163

150 + 12 / 3 + 9

150 + 4 + 9

163

(10 ÷ 5)3 + 100 – 9 x 11 = 7

2 * 3 + 100 - 9 * 11

6 + 100 - 99

7

8 x 4 + 9 – 9 + 18 = 50

32 + 9 - 9 + 18

41 - 9 + 18

32 + 18

50

3 x 8 x 2 – 42 + 5 = 11

24 * 2 - 42 + 5

48 - 42 + 5

11

Answer: 1.2 in

Step-by-step explanation:

The pythagorean theorem states that a²+b²=c².  Thus, 0.9²+b²=1.5².

1.5²=2.25

0.9^2=0.81

0.81 + b² = 2.25

1.44 = b²

b = 1.2

Hope it helps <3 :)

Answer:

38 seats

Step-by-step explanation:

10 + 4x = y

Answer:

$90

Step-by-step explanation:

$120 x .75 = $90

Answer:

a looks congruent to 95° so it's maybe around 95°

Step-by-step explanation:

i'm not sure sorry, but i think it's close to 95°

Answer:

150 pizzas

Step-by-step explanation

36 pizzas are equivalent to 24% so i divided both sides by 4 which gave me 9 pizzas  for 6% . But 6 cannot fully fit into 100 so it will have to be a decimal i did 100 divided by 6 so i would know what i would have to divide both sides by which gave me  50/3 which was 16.66666667 which when i times by 9 by it gave me 150 pizzas

Hope this helps

Answer:

14432 yards I hop this helps

Answer: 2²/₃ pounds

Step-by-step explanation:

There are 8 pounds of fruit.

These are to be used to make 3 equal sized fruit salad.

The weights of each fruit salad will therefore be:

= Pounds of fruit/ Number of fruit salads

= 8 / 3

= 2²/₃ pounds

Answer:

D. -31 is less than -23

Step-by-step explanation:

Answer:

The markup percentage was 135%.

Step-by-step explanation:

In order to find the markup percent, you have to take the sales price minus the cost and divide that by the cost. Then, you have to multiply by 100 to establish the markup percentage:

markup percentage=((19.95-8.50)/8.50)*100

markup percentage=(11.45/8.50)*100

markup percentage=135%

According to this, the answer is that the markup percentage was 135%.

I am reading this correctly, the width = 1/3 of the length?

If this is the case, and we know that the area is 675, the equation is as follows.

Width x Length = 675 ft2

X = length

1/3 X  x  X =  675 ft2

To solve for X we have to multiply both sides by 3.

X square 2 = 2601 square feet.

Take the square of each side.

X =  225 sqare feet.

I hope this helps, let me know if you have any questions.

Answer:

m∠Y = 50°

Step-by-step explanation:

let 'm' = m∠Y

m∠S + m∠Y = 90 (complementary)

5m - 210 + m = 90

6m = 300

m = 50

Answer:

32

Step-by-step explanation: