PLEASE HELP! ITS OVERDUE AND I CANT FIGURE IT OUT!!

Abcd is a parallelogram find the valuse 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

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12