Answer:
Step-by-step explanation:
Cost = 45 * hours worked (x) + 60
a) Cost = 45 * 2 + 60
90 + 60 = 150
b) Cost = 45 * x + 60
285 = 45x + 60
- 60 -60
225 = 45x
/45 /45
5 = x
The job lasted 5 hours.
c) 60 represents the cost for hiring an electrician for 0 hours.
Hope that helps!
