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3 years ago

PLEASE PLEASE PLEASE HELP!! Explanations on how to set it up would be great!

Mathematics

1 answer:

faltersainse [42]3 years ago

8 0

Opposite sides of a parallelogram are congruent.
3x+ 2= 4x-3
Subtract 3x from both sides
2= x -3
Add 3 to both sides
5= x

2y+7=4y-9
Subtract 2y from both sides
7= 2y -9
Add 9 to both sides
16 = 2y
Divide by 2 on both sides
8 = y

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What is 25 percent of 32?

vitfil [10]

Answer:

1.28 or 128

Step-by-step explanation:

you would take 32 and divide it by.25

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3 years ago

45/19 as a decimal rounded to the nearest tenth

Maslowich

Answer:

Step-by-step explanation:

45/19 ~ 2.4

Hope that helps!

8 0

3 years ago

Read 2 more answers

Find the size of each of two samples (assume that they are of equal size) needed to estimate the difference between the proporti

hodyreva [135]

Answer:

The sample size n = 4225

Step-by-step explanation:

We will use maximum error formula = $\frac{z_{a} S.D}{\sqrt{n} }$

but we will find sample size "n"

$\sqrt{n} = \frac{z_{a} S.D}{maximum error}$

Squaring on both sides , we get

$n = (\frac{z_{a} S.D}{maximum error})^2$

Given 99% confidence interval (z value) = 2.56

given maximum error = 0.02

$n = (\frac{z_{a} p(1-p)}{maximum error})^2$

n≤ $(\frac{2.56X\frac{1}{2} }{0.02}) ^{2}$ ( here S.D = p(1-p) ≤ 1/2

on simplification , we get n = 4225

<u>Conclusion</u>:

The sample size of two samples is n = 4225

<u>verification</u>:-

We will use maximum error formula = $\frac{z_{a} S.D}{\sqrt{n} }$ = $\frac{2.56 1/2}{\ \sqrt{4225} }$ = 0.0196

substitute all values and simplify we get maximum error is 0.02

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3 years ago

Elliot wants to compare the density of four objects to the density of water. Elliot knows that if an object sinks in water, it h

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Answer: A would be the best answer

Step-by-step explanation:

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