(3x2 + 4x - 12) = (x + 5) Remove the x on the left by remove one x from both of the sides. (3x2 + 3x - 12) = 5 Add 12 onto both sides (3x2 + 3x) = 17 Multiply (6 + 3x) = 17 Take away 6 from both sides 3x = 11 Divide by 3 on both sides x = 3.666 recurring
The answer is $.085. This is the cost of the gasoline per mile. I got the answer through adding all the expenses (insurance, registration, and maintenance) which added up to $1191 and then subtracting it from $1837, which gets me $646. Lastly, I computed for the cost of gasoline per mile through dividing $646 by 7600 miles. I got .085.
