## Algebra 1: Common Core (15th Edition)

Let x=number of hours dog walking then 15-x=number of hours tutoring $8(15-x) +7.5x\geq115$ Distribute 8: $120-8x+7.5x\geq115$ Simplify: $-0.5x\geq-5$ Divide both sides by -0.5: $\frac{-0.5x}{-0.5}\geq\frac{-5}{-0.5}$ Simplify: $x\leq10$