Please work out all the problems on this page, no links, no i don't knows please do not take advantage of me or my points please actually answer these questions tell me step by step

Which of the choices shown could be used to prove that aacp=abcp ?

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?