document.write( "Question 163598: Noya drives to the city to buy software program at the computer store. Because of traffic she averaged only 15 miles per hour on the way there but averaged 35 miles per hour on the way home. If the total travel time was 2 hours how long does it take her to drive to the computer store. \n" ); document.write( "
Algebra.Com's Answer #120501 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! Let x = amt of time driving to the computer store \n" ); document.write( "then because \"total travel time was 2 hours\" \n" ); document.write( "2-x = amt of time driving home \n" ); document.write( ". \n" ); document.write( "Using the distance formula of \n" ); document.write( "d = rt \n" ); document.write( "where \n" ); document.write( "d is distance \n" ); document.write( "r is rate or speed \n" ); document.write( "t is time \n" ); document.write( ". \n" ); document.write( "\"distance driving to the store\" = \"distance going home\" \n" ); document.write( "15x = 35(2-x) \n" ); document.write( "15x = 70 - 35x \n" ); document.write( "50x = 70 \n" ); document.write( "x = 70/50 \n" ); document.write( "x = 7/5 \n" ); document.write( "x = 1.4 hours \n" ); document.write( "or 1 hour and 24 minutes \n" ); document.write( " \n" ); document.write( " |