# SOLUTION: Carla uses the equation below to determine the fee she charges for a babysitting job. In the equation, f stands for her total fee, and h stands for the number of hours she works.

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Carla uses the equation below to determine the fee she charges for a babysitting job. In the equation, f stands for her total fee, and h stands for the number of hours she works.       Log On

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 Click here to see ALL problems on Linear Equations And Systems Word Problems Question 28935: Carla uses the equation below to determine the fee she charges for a babysitting job. In the equation, f stands for her total fee, and h stands for the number of hours she works. F = 5h+4 How many hours will Carla have to work to make more than \$15 but less than \$20(your answer should be a whole number.) ExplainAnswer by ikdeep(226)   (Show Source): You can put this solution on YOUR website!we are given two condition i.e 1. we need to calculate h such that it is a whole num.. 2. fees should be more than \$15 but less than \$20 also we are given the equation ... F = 5h+4 If we see the second condition which says that fees should be more than \$15 but less than \$20,,,so we are left with only few options i.e fees or F is to be equal to either 16 or 17 or 18 or 19 .... Moreover we are given in first condition that we need to calculate h such that it is a whole num..so F or fees should be such that after subtracting 4 from fees or F, the variable we get which we get must be exactly divisible by 5 ... Hence only 19 can justify all the above condition,,, F = 5h+4 when f = 19...we get 19 = 5h + 4 19 - 4 = 5h 15 = 5h 15/5 = h or h = 3 hours... hope this will help you Please feel free to revert back for any further queries.