A bike shop rents mountain bikes for a $2.50 insurance charge plus $2.70 for each hour. For how many hours can a person rent a bike with $20.05?

Question

Round to the nearest tenth

Answer 1

To understand the problem, begin with the 20.05. You know that you have to pay 2.50 for insurance, so subtract that from the 20.05. Now you have 17.55 remaining. If you divide that 17.55 by the 2.70 that it costs per hour, you get 6.5. Rounding 6.5 to the nearest tenth gives you 7. Here is the way this looks:

 

20.05-2.50=17.55

 

17.55÷2.70=6.5

 

6.5 rounded to the nearest tenth is 7

Answer 2

Let it be x hours.

2.5+2.7x=20.5

2.7x = 18

x= 6.7

 

Answer 3

Let x be the number of hours

 

2.70x +2.50 - 20.05 

 

Solve for x 

 

x= 6.5

 

6.5 hours