Answer
D \$18.80
Work Step by Step
Convert the word problem into an algebraic expression for the cost of shipping. Let x be the weight of the package.
$\underbrace{\$0.85\ per\ pound}\ \underbrace{plus}\ \underbrace{a\ flat\ fee\ of\ \$12}$
$\ \ \ \ \ \ \ \ \ \ 0.85x\ \ \ \ \ \ \ \ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ \ \ 12.00\ \ \ \ \ \ \ \ \ \ \ \ =cost$
Substitute 8 pounds for x to find the cost of shipping.
$0.85(8)+12.00=6.80+12.00=18.80$
