In the triangle, suppose that m ZQ=(5x-8)°, m ZR = (6x - 4)º, and m ZS=xº.

Mathematics

1 answer:

iren [92.7K]2 years ago

7 0

Answer:

a) x+6x-4+5x-8=180

b) <s=16°

<r=92°

<q=72°

Step-by-step explanation:

A). x+6x-4+5x-8=180

12x-12=180

12x=180+12

12x=192

x=192÷12

x=16

b) <s=x=16°

<r=6x-4=96-4=92°

<q=5x-8=80-8=72°

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nadezda [96]

The sample size should be 250.

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Subtract from 1: 1-0.98 = 0.02
Divide both sides by 2: 0.02/2 = 0.01
Subtract from 1: 1-0.01 = 0.99

Using a z-table (http://www.z-table.com) we see that this value has a z-score of approximately 2.33. Using this, our margin of error and our proportion, we have:

$0.04=2.33\sqrt{\frac{0.08(1-0.08)}{n}}
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Divide both sides by 2.33:
$\frac{0.04}{2.33}=\sqrt{\frac{0.08(0.92)}{n}}$

Square both sides:
$(\frac{0.04}{2.33})^2=\frac{0.08(0.92)}{n}$

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Divide both sides to isolate n:
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4 0

3 years ago

Help with my mathhhhh

stealth61 [152]

Answer:

See the image below for the answer:)

Step-by-step explanation: