An electrician charges $20 for a service call plus $40 per hour of service. Write an equation in slope-intercept form for the co
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Plug the -4 into equation
f(-4) = 5(-4) -3
multiply 5•-4= -20
then subtract -20-3
when you have two negatives you add
= -23
f(-4) = 5(-4) -3
multiply 5•-4= -20
then subtract -20-3
when you have two negatives you add
= -23
To find this answer, we need to multiply 3.57 by 12.
Therefore, 12 planks will cost $42.84.
Therefore, 12 planks will cost $42.84.