Find an expression in terms of n for the number of grey tiles in pattern n?

Which of the binomials below is a factor of this trinominal? x^2-13+30

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(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?