Yoko withdrew 40 dollars from her checking account. Write a signed number to represent this change in her account.

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

3x = 729 solve for x plz . it's urgent. will mark