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21-11-2017
Mathematics

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John has a job parking cars. He earns a fixed weekly salary of $225 plus a fee of $5 for each car he parks. His potential earnings for a week are shown in the graph. At what point does John begin to earn more from fees than his fixed salary? Complete the justification of your answer.

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21-11-2017

He earns more from fees after the 45th car. Fixed salary of $225 divided by $5 per car is 45 cars. By the 46th car he’ll have earned $230 in fees ($5* 46 cars = $230 in fees)

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