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Mademuasel [1]
3 years ago
15

Rewrite the equation in slope intercept form 3y - 8x = -9

Mathematics
1 answer:
Nesterboy [21]3 years ago
8 0

Answer:

y = (8/3)x - 3

Step-by-step explanation:

To get to slope intercept, just solve for y

3y - 8x = -9

3y = -9 + 8x

y = (-9 + 8x)/3

y = -9/3 + 8x/3  (distribute the 3 so we can reach the right form)

y = -3 + 8/3(x)

finally write in slope intercept form:

y = (8/3)x - 3

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Figure ABCD is a parallelogram with point C (−4, 1). Figure ABCD is rotated 90° clockwise to form figure A′B′C′D′. What coordina
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A random sample of 200 shoppers at a local grocery store found that 135 of the 200 sampled
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Using the z-distribution, as we are working with a proportion, it is found that samples of 937 should be taken.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

The margin of error is given by:

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

In this problem, we have that:

  • The estimate is of \pi = 0.675.
  • The margin of error is of M = 0.03.
  • 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so z = 1.96.

Then, we solve for n to find the minimum sample size.

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

0.03 = 1.96\sqrt{\frac{0.675(0.325)}{n}}

0.03\sqrt{n} = 1.96\sqrt{0.675(0.325)}

\sqrt{n} = \frac{1.96\sqrt{0.675(0.325)}}{0.03}

(\sqrt{n})^2 = \left(\frac{1.96\sqrt{0.675(0.325)}}{0.03}\right)^2

n = 936.4

Rounding up, it is found that samples of 937 should be taken.

More can be learned about the z-distribution at brainly.com/question/25890103

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