Respuesta :

rivaille21
18-5=13
13/3.25=4
4 hours

The number of hours he need to work is 4.

Given that,

  • Sam charges a $5 travel free and then 3.25 per hour for labor.
  • The earnings is $18.
  • Here we assume the no of hours be x.

Based on the above information, the calculation is as follows:

5 + 3.25x = 18

3.25x = 18 - 5

3.25x = 13

x = 4

Learn more: brainly.com/question/17429689