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2 years ago

The population in the trapezoid-shaped region shown is about 7000 people. How many people are there per square mile?

Mathematics

1 answer:

svlad2 [7]2 years ago

8 0

Answer:

250

Step-by-step explanation:

14 x 4 = 56

56 divided by 2 = 28

<h2>7000 divided by 28 = 250 </h2>

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Answer:

$y = \frac{5000r}{3} -50$

Step-by-step explanation:

Represent the SAT score with y and the rate with r.

So, we have:

$(r_1,y_1) = (90\%,1450)$

$(r_2,y_2) = (69.6\%,1110)$

Required

Determine the equation in slope intercept form

First, we calculate the slope

$m =\frac{y_2 - y_1}{r_2 - r_1}$

This gives:

$m =\frac{1110 - 1450}{69.6\% - 90\%}$

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Convert percentage to decimal

$m =\frac{-340}{-0.204}$

$m =\frac{340}{0.204}$

Multiply by 1000/1000

$m =\frac{340*1000}{0.204*1000}$

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The equation is then calculated as:

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$y - 1450 = \frac{5000}{3}(r - 90\%)$

Open Bracket

$y - 1450 = \frac{5000r}{3} - \frac{5000}{3}*90\%$

Convert percentage to decimal

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Make y the subject

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$y = \frac{5000r}{3} -50$

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