## Calculus with Applications (10th Edition)

$0.5(5r^{2}+3.2r-6)-(1.7r^{2}-2r-1.5)=0.8r^{2}+3.6r-1.5$
$0.5(5r^{2}+3.2r-6)-(1.7r^{2}-2r-1.5)$ Multiply $0.5$ by each term inside its respective parentheses and simplify by combining like terms: $(2.5r^{2}+1.6r-3)-(1.7r^{2}-2r-1.5)=0.8r^{2}+3.6r-1.5$