Question

The cost to rent a car is $30 per day. Write an expression for the cost of renting a car d days. Make a table to find how much it will cost to rent a car for 3, 5, 7, and 10 days.

Answer 1

d = day
c = cost

c = 30d

Day(d) | c = 30d | Cost(c)
3 | 90=30(3) | $90
5 | 150=30(5) | $150
7 | 210=30(7) | $210
10 | 300=30(10) | $300

Answer 2

• The expression for the cost of renting a car d days is:

`c=30d`

• The table can be made as follows:

Number of days Cost

3 90

5 150

7 210

10 300

Explanation:

It is given that:

The cost to rent a car is $30 per day.

Now, the expression which is used to represent the cost for renting a car d days is:

`c=30d`

where c is the cost of renting a car.

when d=3 we have:

c=90

( Since, 30×3=90 )

when d=5

c=150

( Since, 30×5=150 )

when d=7

c=210

( Since, 30×7=210 )

when d=10

c=300

( Since, 30×10=300 )