NEED HELP ASAP FREE BRAINLIST

Which of the following pairs of numbers contains like fractions?

Harrizon [31]

Answer:

D

Step-by-step explanation:

if you multiply 5 by 2 you get 10

if you multiply 6 by 2 you get 12

5/2 (2) =10/12

Hope this helped

:)

4 0

3 years ago

Read 2 more answers

In a sample of 230 teenagers, 202 would like to have smaller class sizes at their school. Find the sample

marishachu [46]

Answer:

The sample proportion is 0.88.

The margin of error is of 0.04.

The interval likely to contain the true population proportion is (0.84,0.92).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

Margin of error:

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

Sample of 230 teenagers, 202 would like to have smaller class sizes at their school.

This means that $n = 230$ , and that the sample proportion is:

$\pi = \frac{202}{230} = 0.88$

The sample proportion is 0.88.

Standard 95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Margin of error:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$M = 1.96\sqrt{\frac{0.88*0.12}{230}}$

$M = 0.04$

The margin of error is of 0.04.

Confidence interval:

Sample proportion plus/minus margin of error. So

0.88 - 0.04 = 0.84

0.88 + 0.04 = 0.92

The interval likely to contain the true population proportion is (0.84,0.92).

5 0

3 years ago

How many terms are there in the following expression? x - 5 + 16x + 4 - 2x - 3

k0ka [10]

Answer:

Two terms

Step-by-step explanation:

First, we have to simplify reducing the number of terms, since there are like terms

x-5+16x+4-2x-3

Eventually, you'll get 15x-4, thus there are two terms.

Please correct me if I'm incorrect, and I'll change the answer, but I hope I helped :)

3 0

3 years ago

In one baseball season, Peter hit twice the difference of the number of home runs Alice hit and 6. Altogether, they hit 18 home

shutvik [7]

H = Alice's home runs
p = Peter's home runs

p = 2(h - 6)
p + h = 18

Simplified:
p = 2h - 12
p - 2h = -12

p + h = 18

Solve simultaneously:
p - 2h = -12 ...1
p + h = 18 ...2

1 - 2:
-3h = - 30
h = -30/-3
h = 10

Substitute into 2:
p + h = 18
p + 10 = 18
p = 18 - 10
p = 8

Therefore, Peter hit 8 home runs and Alice hit 10 homeruns.

6 0

3 years ago

Please help ASAP URGENT

Shtirlitz [24]

Think of variable K as number of trees planted and variable J as number of minutes it takes to plant the trees.

K = _J + _

For every 4 trees planted it takes 2 minutes to plant them, so we now have -4/2. 4 is negative because we don't have an unlimited amount of trees to plant. With this being said, we can use this fraction as J.

K = -4/2J + _

We lose 4 trees every 2 minutes, but how many trees did we initially start out with? According to the graph, we started with 28 trees, so K = -4/2J + 28.

Now we can test this equation out by picking a random dot on the graph: 24/2.

24 = -4/2(2) + 28

24 = -4 + 28

24 = 24

This statement is correct, so our equation is correct.

5 0

3 years ago