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4 years ago

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Point M is the midpoint between points A and B. If A(−5, 4) and B(−1, −8) find the location of M. M is located at the point . AS

AP PLEASEEE

1 answer:

Elanso [62]4 years ago

5 0

Answer:

i think it is -3,-2

Step-by-step explanation:

i dont have one

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nevsk [136]

In order to do this, you need to use the equation:
distance=rate x time

So if you want to find out how long it will take you plug 63 miles into the equation.

63 miles=Rate x Time

You want to find out how long so you need the rate.

You can find the rate from the first sentence.

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Plug this into the original equation.

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#5 Option B

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3 years ago

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A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained p

wel

Answer:

A sample size of 1380 should be obtained.

Step-by-step explanation:

Minimum sample size:

The minimum sample size is of:

$n = (\frac{z}{E})^2(p_1(1-p_1) + p_2(1-p_2))$

In which z is the critical value, related to the confidence level, E is the desired margin of error, $p_1$ and $p_2$ are the proportions.

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

Estimates of 22.6% male and 18.1% female from a previous year

This means that $p_1 = 0.226, p_2 = 0.181$ .

Within 3 percentage points, minimum sample size:

This is n for which $E = 0.03$ . So

$n = (\frac{z}{E})^2(p_1(1-p_1) + p_2(1-p_2))$

$n = (\frac{1.96}{0.03})^2(0.226*0.774 + 0.181*0.819)$

$n = 1379.4$

Rounding up:

A sample size of 1380 should be obtained.

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3 years ago