Solve.Mark the electrician charges $120 for a house call, and then $40 per hour for labor. Sara the electrician charges $80 for a house call, and then $50 per hour for labor. Graph the system to find the number of hours of electrical work that would be required for the two electricians to charge the same amount.
A. 3.5 hr
B. 4.5 hr
C. 3 hr
D. 4 hr
Answer: D
Mathematics
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