Question

Suppose that 15 inches of wire costs 45 cents. At the same rate, how many inches of wire can be bought for 24 cents? Please help!!

Answer 1

`15\ inches\ cost\ 45\ cents\\ x\ inches\ cost\ 24\ cents\\\\ proportion:\\ 15-45\\ x-24\\\\ cross\ multiplication\\\\ 15*24=45x\\\\ 360=45x\ \ \ | divide\ by\ 45\\\\ x=8\\\\ 8\ inches\ of \ wire\ cost\ 24\ cents.`