Answer: 50x+25=c
8hrs:$425
10hrs:$525
Step-by-step explanation: You pay $50 per hour, so 50x (x is the number of hours) and plus $25 for the service call. So if he works for 8 hours you would, use 50×8+25=425, if he worked 10 hours you would use 50×10+25=525.
Hope this help you answer your problem.