Enter the function for me y=5x+4 reflected across both axes

The sum of two numbers is 86, and their difference is 20. find the two numbers

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

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%