Help with permutations (no links or files) How many ways can 3 different math books, 5 different chemistry books, and 7 different physics books be arranged on a shelf if the books of each subject must be kept together?

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.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?