7.5 gallons. (5x60)/40 5x60 being the equation to find the total miles driven
You have to find a common denominator 1st then add. So 16 is the common denominator the problem should be 2 7/16+1 14/16+8-16= 3 29/16 then you need to divide 29/16 you will have 4 13/16
I thinks it’s between A and B
