Problema Solution
mark the electrician charges $115 for a house call, and the $25 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
Answer provided by our tutors
let x = the number of hours of electrical work
the total amount charged by Mark is described with the linear equation
y = 25x + 115
the total amount charged by Sara is described with the linear equation
y = 50x + 80
click here to see the graph of the two equations
the intersection point is (1.4, 150) that is for x = 1.4 hr they will both charge the same amount.