For the following right triangle, find the side length x. Round your answer to the nearest hundredth. 10
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15

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Asap! i'm not good math and i'm lost.

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square