Annie: 4 (x + y + z)
bradley: 4x + yz
carlos: 4xyz
zuri: 4x + 4z + 4y

students are asked to write an equivalent expression for 4x + 4y + 4z using the distributive property. which student correctly wrote the expression?
a) annie
b) bradley
c) carlos
d) zuri
pl ! 15 !

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%