Solve the problem. Dema's truck gets 32mpg on the highway and 18mpg in the city. The amount of gas he uses A (in gal) is given by A=(1)/(18)c+(1)/(32)h , where c is the number of city miles driven and ℎ h is the number of highway miles driven. How many gallons of gas will Dema use if he drives 150 city miles and 250 highway miles?
