How can I understand Algebra 2 better and faster?

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

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Which linear inequality is represented by the graph?