Factor the following polynomial completely. x^2n-y^2n

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great