17 is what percentage of 50?

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?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?