Which phrase best describes f(x), graphed on the coordinate plane below?

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).