What is the answer to this question?

What is the measure of angle afe? 79 81 91 99

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

For what values of x is x2 + 2x = 24 true?