The correct answer to this question is A, $11.56. To solve this question, would first know how many miles Louis drives each week. The commute to work is 10 miles each way. This makes it 20 back and forth. Louis only drives to work three days a week. Three times 20 equals 60, so each week, Louis is driving 60 miles.
Being that he gets 30 miles to the gallon, you would divide 60 by 30, which gives us 2. Using 2, we would multiply that by the $2.89 Louis spent per gallon. That gives us $5.78 for one week. To get two weeks, we multiply $5.78 by two for $11.56.
To figure how much Louis's gas will cost for 2 weeks you first have to know that he drives 60 miles per week so you take the 60 miles and devide by 30 = 2 then 2 x 2.89 = 5.78 per week but for 2 weeks the amount would be 2 x 5.78 = 11.56. He would spend 11.56 for two weeks to go back and forth to work.