If M is the midpoint of CD, CM = 4x - 5, and MD = 2x + 5, find CM

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

What is the value of x in the following equation? -3x-2=2x+8

The measure of an angle is 117°. what is the measure of a supplementary angle?