Jack drove 39 1/2 miles he used 1 1/4 gallons of gasoline what is the unit rate for miles per gallon

31.6 miles per gallon

Step-by-step explanation:

Given that:

Miles driven = 39 1/2 miles

Gallons of gasoline used = 1 1/4 gallons

The unit rate for miles per gallon :

Total miles driven / gallons of gasoline used

39 1/2 ÷ 1 1/4

79/2 ÷ 5/4

79 /2 * 4/5

(79 * 4) / 10

316 / 10

= 31.6 miles per gallon

quit

step-by-step explanation:

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2