Show fraction or mixed numbers as decimal

Although changes result from business transactions, the equality of the fundamental bookkeeping equation must remain. t/f

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Which is the completely factored from of xy^3-x^3y