Yan buys a shirt on sale for 75% off. He pays $10.00.
How much did the shirt cost before the
sale?

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%

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

Layla answer 21 of the 25 questions on his history test correctly.what decimal represents the fraction of problem he answer incorrectly.