Question 537638
 Tim wants air conditioning in his room. The air conditioner costs $45. Each day the electricity costs $2. Write an expression that can be used to find the cost to run the air conditioner for d days 
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Cost(d) = 45 + 2*d
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If Tim spent $85 to cool his room, how many days did he run the air conditioner?
Solvd: 45+2d = 85
2d = 40
d = 20 (# of days)
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Cheers,
Stan H.
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