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A plumber charges a $70 call-out fee and then $90 per hour. Write an expression for the total cost of calling a plumber for x hours.
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A plumber charges a $70 call-out fee and then $90 per hour. Write an expression for the total cost of calling a plumber for x hours.

User Jarrod Baker
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1 Answer

2 votes

Answer:

f(x)=90x+70

Explanation:

User Blackjacx
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