9) Dema's truck gets 32 mpg on the highway and 18 mpg in the city. The amount 9) 1 1 of gas he uses A (in gal) is given by A = -C + -h, where cis the number of 18 32 city miles driven and h is the...

Extracted text: 9) Dema's truck gets 32 mpg on the highway and 18 mpg in the city. The amount 9) 1 1 of gas he uses A (in gal) is given by A = -C + -h, where cis the number of 18 32 city miles driven and h is the number of highway miles driven. If Dema drove 45 mi in the city and used 8 gal of gas, how many highway miles did he drive?