Question

Marcello plans to purchase 5 pounds of apples for the week. In addition to the cost of the apples, Marcello will need to pay a 5% sales tax. Let c represent the cost per pound of the apples. Which expressions can Marcello use to calculate his total cost?
Select each correct answer.

1.05(5c)

5(c+0.05c)

5c+0.05(5c)

0.95(5c)

Answer 1

We define the variables:
 c: represent the cost per pound of the apples
 In addition, we have a 5% tax
 The correct expression for the total cost will then be:
 5c + 0.05 * 5 * c 
 This expression can be rewritten in other ways:
 5 (c + 0.05c)
 5c + 0.05 (5c)
 1.05 (5c)
 Answer: 
 The correct answers are: 
 5 (c + 0.05c)
 5c + 0.05 (5c)
 1.05 (5c)