What is the value of x that will make k || m?
18.2
12.0
9.2
2.4

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

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%

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab