50=1/2(12+13)
what is the answer?

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

What is the absolute value of the complex number -4-sqrt2i

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π