Wallace has a $50 bill. Pizza pies cost $12.25 each. If p represents the number
of pizzas he buys, write an expression for
the change he receives.

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$