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3 years ago

Need the value for x and y

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

6 0

Answer:

B. x = 20, y = 128

Step-by-step explanation:

( 3x - 8 ) and ( 2x + 12 ) are vertically opposite angles.

Vertically opposite angles are equal.

3x - 8 = 2x + 12

3x - 2x = 12 + 8

x = 20

( 3x - 8 ) + y = 180 ( Reason : Linear pair )

3 ( 20 ) - 8 + y = 180

60 - 8 + y = 180

52 + y = 180

y = 180 - 52

y = 128

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Answer:

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C) The confidence interval is (0.5406, 0.5944).

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.

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In which

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

The margin of error is:

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$M = 1.645\sqrt{\frac{0.5675*0.4325}{918}} = 0.0269$

The margin of error is 0.0269.

C) construct the confidence interval.

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$\pi - M = 0.5675 - 0.0269 = 0.5406$

$\pi + M = 0.5675 + 0.0269 = 0.5944$

The confidence interval is (0.5406, 0.5944).

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3 years ago

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Using proportions, it is found that the farmer has planted 258 acres.

<h3>What is a proportion?</h3>

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More can be learned about proportions at brainly.com/question/24372153

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2 years ago

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Answer:

B A C

Step-by-step explanation:

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