Solve for x and y.
(Simplify your answer. Type an exact answer, using radicals as needed.)

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

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

Ineed with math stuff it involves graphs