Angle sum theory

PLS HELP!!

A)74°

B)92°

C)83°

D)82°

Which rational number could be graphed between -4 and -5

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%

What term makes it inconsistent y=2x - 4