Rico saved $30 to buy office supplies. he needed a binder that cost $9.99 , including tax, and three pens that cost $1.99 each, including tax. how much money will rico have left after he buys the pens and the binder?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?