Question

One electrician charges a $50 service call fee plus $25 per hour for labor. Another electrician charges a $35 service call fee plus $27.50 per

hour for labor. How long would a job take if the total cost for each electrician is the same?
A.5 hours
B.6hours
C.7 hours
D.8 hours

Answer 1

c. 6 hour

Explanation:

time = t

25t + 50 = 27.50t + 35

solve for t : 25t + 50 = 27.5t +35

27.5t + 35 = (55t) /2 + 35 : 25t + 50 = (55t) /2 + 35

subtract (55t) /2 + 50 from bot side : -(5t) /2 = -15

multiply both side by -2/5: t = 6 hours