Answer:
See below in bold.
Step-by-step explanation:
Blue car: unit rate = miles / gallons used = 36 1/2 / 1 1/4
= 73/2 / 5/4
= 73/2 * 4/5
= 73*2/5
= 29.2 mi/gal.
Red car: Unit rate = 20 4/5 / 4/5
= 104/5 * 5/4
= 104/4
= 26 mi/gal.
The blue car travels the greater distance on 1 gallon of gas.