document.write( "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? \n" ); document.write( "

Algebra.Com's Answer #270356 by stanbon(75887) $\"\"$ $\"About$

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Cost of road service. Rick’s Automotive charges $50 plus $15 for each (15-min) unit of time when making a road call.
\n" ); document.write( "R(x) = 50+15x where x is a 15-minute unit of time
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\n" ); document.write( " 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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\n" ); document.write( "Under what circumstances would it be more economical for a motorist to call Rick’s?
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\n" ); document.write( "Solve R(x)\n" ); document.write( "50+15x < 70+10x
\n" ); document.write( "5x < 20
\n" ); document.write( "x < 4
\n" ); document.write( "----
\n" ); document.write( "Rick is less expensive than Twin if the time is less than 4 unit = 1 hour.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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