## Elementary Algebra

$= 21.8$ miles per gallon
1. Subtract the final and initial distance to find the distance travelled $= 25,170.5 - 24,876.2$ $= 294.3$ miles 2. Let $x =$ the number of miles per gallon: $13.5x = 294.3$ $x = \frac{294.3}{13.5}$ $x = 21.8$ miles per gallon