Solve it (4+3x) (5)

Please explain how you got your answer!

Which of the binomials below is a factor of this trinominal? x^2-13+30

Given that abcd is a rhombus, what is the value of x?

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