The expression 33n+13f+7p+10d represents the cost, in dollars, to purchase n cases of paper, ff packages of hanging folders, pp packs of pencils, and dd flash drives. which statement is not true? a.) the term 7p represents the cost for 7 packs of pencils. b.) the coefficient 10 represents the cost of each flash drive. c.) the coefficient 7 represents the cost of one case of paper. d.) the term 13f represents the cost of ff packages of hanging folders at $13 per package.