MN is parallel to PQ. Find x. Please help!!

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%

How to use order of operation in 20 divide by 4 multiply 5 = 1

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.