document.write( "Question 1073639: You are one mile from the railroad station, and your train is due to leave in ten minutes.
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document.write( "You have been walking at a steady rate of 3 mph, and you can run at 8 mph if you have to.
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document.write( "For how many more minutes can you continue walking, until it becomes necessary for you
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document.write( "to run the rest of the way to the station? \n" );
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Algebra.Com's Answer #688436 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! You are one mile from the railroad station, and your train is due to leave in ten minutes. \n" ); document.write( "Let walking time be \"x\" min; running time be \"10-x\" min \n" ); document.write( "You have been walking at a steady rate of 3 mph, and you can run at 8 mph if you have to. \n" ); document.write( "For how many more minutes can you continue walking, until it becomes necessary for you \n" ); document.write( "to run the rest of the way to the station? \n" ); document.write( "-------- \n" ); document.write( "Equation: \n" ); document.write( "dist + dist = 1 mile \n" ); document.write( "(3/60)x + (8/60)(10-x) = 1 mile \n" ); document.write( "3x + 80-8x = 60 \n" ); document.write( "-5x = -20 \n" ); document.write( "x = 4 min (walking time) \n" ); document.write( "10-x = 6 min (running time) \n" ); document.write( "------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------- \n" ); document.write( " \n" ); document.write( " |