document.write( "Question 209451: Harry and Gary are traveling to Nashville
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document.write( "to make their fortunes. Harry leaves on the train at 8:00 A.M.
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document.write( "and Gary travels by car, starting at 9:00 A.M. To complete
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document.write( "the 300-mile trip and arrive at the same time as Harry, Gary
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document.write( "travels 10 miles per hour (mph) faster than the train. At
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document.write( "what time will they both arrive in Nashville?
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document.write( "I am supposed to use the quadratic equation, but this is all I have come up with.\r
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document.write( "300/8x=300/(9x+10) \n" );
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Algebra.Com's Answer #158373 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Harry leaves on the train at 8:00 A.M. \n" ); document.write( "and Gary travels by car, starting at 9:00 A.M. To complete \n" ); document.write( "the 300-mile trip and arrive at the same time as Harry, Gary \n" ); document.write( "travels 10 miles per hour (mph) faster than the train. At \n" ); document.write( "what time will they both arrive in Nashville? \n" ); document.write( "-------------------------------------- \n" ); document.write( "Gary DATA: \n" ); document.write( "distance = 300 miles ; rate = x mph ; time = d/r = 300/x hrs\r \n" ); document.write( "\n" ); document.write( "----------------------- \n" ); document.write( "Harry DATA: \n" ); document.write( "distance = 300 miles ; rate = (x+10) mph ; time = d/r = 300/(x+10) hrs \n" ); document.write( "---------------------------------------- \n" ); document.write( "Equation: \n" ); document.write( "Harry time - Gary time = 1 hr \n" ); document.write( "300/(x+10) - 300/x = 1 \n" ); document.write( "300x - 300(x+10) = x(x+10) \n" ); document.write( "-3000 = x^2+10x \n" ); document.write( "x^2 + 10x - 3000 = 0 \n" ); document.write( "Factor the Quadratic: \n" ); document.write( "(x+60)(x-50) = 0 \n" ); document.write( "Positive solution: \n" ); document.write( "x = 50 mph (Gary's rate) \n" ); document.write( "x+10 = 60 mph (Harry's rate) \n" ); document.write( "---------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "Reply to stanbon@comcast.net\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |