Question

Michelle is renting a car for a trip to a conference. Thecost to rent the car for one day is $23 and $0.21 per mile.a.Identify the variables andb.Use the variables to write an equation to represent thecost of renting the truck.

Answer 1

The cost of the car rented by Michelle varies with two things the number of days she'll keep the car and the number of miles she'll travel with the car. To find the total cost we need to multiply the cost per day by the number of days she keep it and add the cost of mile traveled by the total number of miles traveled.

a. We have two variables: The number of days she keeps the car (d) and the number of miles she travels with it (m).

b. The expression that represent the cost is:

`\text{cost = 23}\cdot d\text{ + 0.21}\cdot m`