Given:
Carmen rents roller skates for $5 plus $2 for every hour she uses them.
To find:
The expression for the total cost to rent roller skates. Then find the total cost if Carmen rest them for 4 hours.
Solution:
We have,
Fixed rent = $5
Additional rent = $2 per hour.
Let x be the number of hours.
So, additional rent is $2x.
Now,
Total rent = Fixed rend + Additional rent
= $(5+2x)
So, the expression for total cost is $(5+2x).
Carmen rent them for 4 hours. So, x=4 and the total cost is
[tex]\text{Total cost}=5+2(4)[/tex]
[tex]\text{Total cost}=5+8[/tex]
[tex]\text{Total cost}=13[/tex]
Therefore, the total cost of 4 hours is $13.
