On her 10 mile trip to school, Jessica's car gets 50 mpg of gas. On her way home, her car gets 40 miles per gallon. How many miles per gallon does Jessica's car get during the entire 20 mile trip?
50 miles each gallon for a 10 mile drive = 1/5 gallon
40 miles each gallon for a 10 mile drive = 1/4 gallon
1/4 + 1/5 = 9/20
20 miles driven /9/20 gallon = 400/9 = 44.44 miles per gallon
50 miles each gallon for a 10 mile drive = 1/5 gallon
40 miles each gallon for a 10 mile drive = 1/4 gallon
1/4 + 1/5 = 9/20
20 miles driven /9/20 gallon = 400/9 = 44.44 miles per gallon