Algebra 2 math word question

Question

The EPA lists the greenest hybrid car getting 61mpg on the high way and 50mpg in the city. Write and simplify an expression for the total number of miles the car will travel if the tank hold 15 gallons

Answer 1

g represents the gallons at 61 mpg

15 - g represents the gallons at 50 mpg

 

61g + 50(15 - g)

61g + 750 - 50g

11g + 750