document.write( "Question 655087: during a race john has 40 second lead over mary.
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document.write( "john runs at a speed of 1.15 meters per second, and mary runs at a speed of 2 meters per second. how long will it take mary to overtake john? \n" );
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Algebra.Com's Answer #408934 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! during a race john has 40 second lead over mary. \n" ); document.write( "john runs at a speed of 1.15 meters per second, and mary runs at a speed of 2 meters per second. how long will it take mary to overtake john? \n" ); document.write( "** \n" ); document.write( "let x=mary's travel time \n" ); document.write( "x+40=john's travel time \n" ); document.write( ".. \n" ); document.write( "distance=travel time*speed (same for both) \n" ); document.write( "1.15(x+40)=2x \n" ); document.write( "1.15x+46=2x \n" ); document.write( ".85x=46 \n" ); document.write( "x≈54.1 \n" ); document.write( "how long it will take mary to overtake john≈54.1 sec \n" ); document.write( " \n" ); document.write( " |