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 Variable expressions Evaluate variable expressions for numerators and denominators Evaluate the expression $\frac{20}{k}$ for k = 10. Simplify your answer. Plug in k=10 and simplify $\frac{20}{k}=\frac{20}{10}=2$ Evaluate the expression $\frac{q-r}{r}$ for q = 15 and r = 3. Simplify your answer. Plug in q = 15 and r = 3 and simplify $\frac{q-r}{r}=\frac{15-3}{3}=\frac{12}{3}=4$ Evaluate the expression $\frac{15-c}{u}$ for c=3 and u=2 Solution: