SOLUTION: Cost of road service. Rick’s Automotive charges $50 plus $15 for each (15-min) unit of time when making a road call. Twin City Repair charges $70 plus $10 for each unit of time. Un
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Question 381009: Cost of road service. Rick’s Automotive charges $50 plus $15 for each (15-min) unit of time when making a road call. Twin City Repair charges $70 plus $10 for each unit of time. Under what circumstances would it be more economical for a motorist to call Rick’s? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Cost of road service. Rick’s Automotive charges $50 plus $15 for each (15-min) unit of time when making a road call.
R(x) = 50+15x where x is a 15-minute unit of time
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Twin City Repair charges $70 plus $10 for each unit of time. T(x) = 70 + 10x where x is a 15-minute unit of time.
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Under what circumstances would it be more economical for a motorist to call Rick’s?
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Solve R(x)
50+15x < 70+10x
5x < 20
x < 4
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Rick is less expensive than Twin if the time is less than 4 unit = 1 hour.
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Cheers,
Stan H.
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