Prove that A (-2,3), B(8,2), C(4,5) are the vertices of a right triangle Pls help 10 points!!

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

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)