Respuesta :

Answer:

21 miles per 1 gallon

Step-by-step explanation:

The unit rate is how many to 1 so, 42 divided by 2 equals 21 so, the answer is given.

PLZ MARK BRAINLIEST!!!

Answer:

21 mpg

Step-by-step explanation:

The unit rate is:

  42 miles

------------------- = 21 mpg

 2 gallons