A bill for the repair of a laptop was $249. The cost of the parts was $84, and the labor charge was $55 per hour. How many hours did it take to repair the laptop?​

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?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

What are the solutions of the following system? y=-2x^2 y=x-2