how many hours can the bike be rented for

Question

a rental company charges $15 plus $4 per hour to rent a bicycle. If Margie does not want to spend more than $27 for her rental, write and solve an inequality to find how many hours she can rent the bicycle and not spend more than $27. Intepret the solution.

Answer 1

The total cost for X hours is the fixed cost of $15 plus the variable cost of $4 per hour which is equal to 4*X, so the total cost is 4*X + 15 

 

If Margie does not want to spend more than $27 then the inequality is 

 

4*X + 15 <= 27

4*X <= 12

X <= 3 

 

If Margie does not want to spend more than $27 then she cannot rent the bicycle for more than 3 hours