12n-4=3n-22 what is the value of n=

The table respent two linear functions the equation respented by the first tables is given

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%

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.