A local hamburger shop sold a combined total of 399 hamburgers and cheeseburgers on Sunday. There were 51 fewer cheeseburgers sold than hamburgers. How many hamburgers were sold on sunday?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

On monday, the water was shut off 3 times for 1/4 hours, 2/3 hours, and 1-3/4 hours, respectively. what was the tireless number of hours the water was off?

If f(x) = 5х – 2 and g(x) = 2х + 1, find (f – g)(x).