Trey's car has a 40 gallon tank. The fuel gauge points to . If Trey buys 30 gallons of gas, what will be the new reading on the gas gauge?

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.