I will give u the brinlist if the answer is right

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%

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.