Evaluate. Express your answer in simplest form.

7/9 - 2/8× 4/9

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

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

3x + 4y = 5 x- 3y = -7 solve by substitution