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3 years ago

Graph the equation on the coordinate plane (y+2)=1/2(x-2)

Mathematics

1 answer:

Svetradugi [14.3K]3 years ago

4 0

on the y axis choose 2 and on the x axis choose $\frac{x}{2} -1$ .

That is what I believe.

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Write the equation of the line that goes through<br> the points (-3, -2) and (4, 5).

sattari [20]

Find the slope m.

Use the point-slope formula.

Solve for y.

6 0

3 years ago

A square has an area of 49 in.² what is each side of the perimeter

ludmilkaskok [199]

I hope this helps you

square one side a

Area=a.a

49=a.a

7.7=a.a

a=7

Perimeter=4a=4.7=28

8 0

3 years ago

Really really easy question. please help.

never [62]

Answer:

line

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

g A researcher wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in Atlanta who own a

Helga [31]

Answer:

The sample size needed is 2401.

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 zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error of the interval is:

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

95% confidence level

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

Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

We have to find n, for which M = 0.02.

There is no estimate of p available, so we use $\pi = 0.5$

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

$0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.02\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.02}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}$

$n = 2401$

The sample size needed is 2401.

7 0

3 years ago

Read 2 more answers

Danielle earns an 8.25% commission on everything she sells at the electronics store where she works. She also earns a base salar

Sauron [17]

Lets begin with our y=mx+b, our constant(b) is 800 that she earns as a salary, our x represents the amount she sells, m then represents the commission which is 8.25% so converting that to a decimal and replacing it as m gets us y = 0.0825x+800. Replace $4500 for x and we have y=0.0825(4500)+800 solve and we get $1171.25

7 0

3 years ago