Solve equatiob using the subtractiob and addition properties of equality
6a -3 = -7a, a=3/13

Ihave trouble finding the nth term of a linear sequence

In the geometric progression –3, 12, −48… what term is 3,072?

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