Suppose X and Y represent two different school populations where X > Y and X and Y must be greater than 0. Which of the following expressions is the largest? Explain why. Show all work necessary. A: x^2+y^2
B: x^2-y^2
C: 2(x+y)
D: (x+y)^2

Suppose there are 10 five and six-year-old attending a birthday party. when a 30 year old mother walks into the room with an infant in her arms, what happens to the mean age in the room? what happens to the standard deviation of ages in the room? a. the mean and standard deviation of both change. b. the meaning will change, but the standard deviation will stay approximately the same. c. i mean will stay approximately the same, but the standard deviation will change. d. the mean and standard deviation will both stay approximately the same.

What is the range for 31,39,29,34,37,24,36,33,34,28

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?