document.write( "Question 638269: John drives a car from Statesville NC to Wilmington NC. During the first part of the trip he drove at a rate of 60 mph, but later traffic was very heavy and in the second part of the trip he could only drive at a rat of 40 mph. If it is 240 miles from Statesville to Wilmington and if the whole trip takes 5 hours, how far does John drive at 40 mph and how far does he drive at 60 mph?\r
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document.write( "I really want to understand exactly how to do this. If you could please break it down simple so I can understand it and be able to \"click\" in my brain.\r
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document.write( "Thank you! \n" );
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Algebra.Com's Answer #402117 by MathTherapy(10552)![]() ![]() You can put this solution on YOUR website! John drives a car from Statesville NC to Wilmington NC. During the first part of the trip he drove at a rate of 60 mph, but later traffic was very heavy and in the second part of the trip he could only drive at a rat of 40 mph. If it is 240 miles from Statesville to Wilmington and if the whole trip takes 5 hours, how far does John drive at 40 mph and how far does he drive at 60 mph?\r \n" ); document.write( "\n" ); document.write( "I really want to understand exactly how to do this. If you could please break it down simple so I can understand it and be able to \"click\" in my brain.\r \n" ); document.write( "\n" ); document.write( "Thank you!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let the distance that John drove at 40 mph be D\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Then distance he drove at 60 mph = 240 - D\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Time taken to drive at 40 mph, plus time taken to drive at 60 mph, equals total time, \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "OR\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3D + 2(240 – D) = 600 ------ Multiplying by LCD, 120 \n" ); document.write( "3D + 480 – 2D = 600 \n" ); document.write( "3D – 2D = 600 – 480 \n" ); document.write( "D, or distance driven at 40 mph = \n" ); document.write( "\n" ); document.write( "Distance driven at 60 mph = 240 – 120, or \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You can do the check!!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com \n" ); document.write( " |