Amotor scooter travels 20 miles an hour in the same time that a bicycle covers 9 miles an hour if the rate of the scooter is 9 miles per hour more than twice the rate of the bicycle find both rates?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?

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