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30-08-2018
Mathematics

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A plumber charges $70 per hour $40 for the call. What does he charge for 4 hours of work Use x to represent the hours of work

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DoodleDingo DoodleDingo

30-08-2018

f(x)=70x+40
f(4)=280+40
f(4)=320
He will make $320 in 4 hours.

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