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Listen The equation C = 20x + 80 gives the cost, C, to hire a plumber for x hours. a. What is the cost for

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Listen The equation C = 20x + 80 gives the cost, C, to hire a plumber for x hours. a. What is the cost for 4 hours? b. If the cost is $140, for how many hours did the plumber work? Paragraph BY Ev + . . . a

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