Can some please help me please

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.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?