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3 years ago

PLEASE HELP I WILL MARK!!

Mathematics

1 answer:

Rina8888 [55]3 years ago

8 0

answer is D

Explamation:

given points are (7,9) and (12,11)

$mid \: point \: of \: x = \frac{x1 + x2}{2 } = \frac{7 + 12}{2} = 9.5 \\ midpoint \: of \: y = \frac{y1 + y2}{2} = \frac{9 + 11}{ 2} = 10$

therefore the mid point is (9.5,10)

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2 years ago

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Using proportions, it is found that the speed of the runners are of 16 mph and of 20 mph.

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

A proportion is a fraction of a total amount.

After 30 minutes, the runners are 2 miles apart, hence the second runner is 4 miles per hour faster than the second, that is:

$v_2 = v_1 + 4$ .

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More can be learned about proportions at brainly.com/question/24863377

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