Carrie is three times older than Julio. If the sum of their ages is 48, how old is Carrie?

What is the slope of the line shown below?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?