Help fast plz What is the length of the missing side? Use the Pythagorean Theorem

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?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

What is always true when two whole numbers are subtracted?