A non-right triangle is divided into two smaller right triangles by an altitude that is 4 inches in length. The base of one right triangle is 10 inches. The base of the other right triangle is 8 inches. What is the area of the non-right triangle?

(-1,-0.5)

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.