Find the 9th term of the geometric sequence 4, -16, 64,
Delta math is killin me :/

Use the quadratic formula to solve 5x=6x^2-3,what are the values of x?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.