The variables y and x have a proportional relationship, and y = 5 when x = 4. What is the value of x when y = 8? Enter your answer in the box. x = ? plz anwser!

Working on itts i’m going to need you to me as i go along 1-5

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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%