Which statement is true?

A. -8xy and x+y are like terms.

B. -8xy and 9x are like terms.

C. -8xy and 9y are like terms.

D. -8xy and 9xy are like terms

You can model the population of a certain city between 1955-2000 by the radical function p(x)=55,000 sqrt x-1945. using this model, in which year was the population of that city 220,000

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?