If DM=35, what is the value of r? Where DG is r+5 and GM is 3r-14

This question awards 100 ! i really don’t want to fail i will also mark you !

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.