Write an equation for the following:
“three times the sum of a number and four is the same as eighteen more than the number.”

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%

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

Find the average rate of change for the given function drom x=1 to x=2