Question

He electrician charges $70 per hour plus a $35 service fee. The total cost, c, for t hours of work is given by the equation c = 70t + 35. If the total cost of the electrician's last job was $245, for how many hours did he work?

Answer 1

3 hours

Explanation:

Since the service fee was $35, you can take that out of the total.

Now you are left with 210.

210 / 70 = 3