document.write( "Question 163912: Two cars start from the same place traveling in opposite directions. One car travels 4 miles per hours faster than the other car. Find the speed their speeds if after 5 hours they are 520 miles apart.\r
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document.write( "This is how I tried to work it out?\r
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document.write( "_________________________________________ Distance Time Rate
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document.write( "1st car 4 4X(5)
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document.write( "2d car 4 4+4(5) \n" );
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Algebra.Com's Answer #120746 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 5x+5(x+4)=520 \n" ); document.write( "5x+5x+20=520 \n" ); document.write( "10x=520-20 \n" ); document.write( "10x=500 \n" ); document.write( "x=500/10 \n" ); document.write( "x=10 mph. for the slower car. \n" ); document.write( "50=4=54 mph. for the faster car. \n" ); document.write( "Proof: \n" ); document.write( "5*50+5*54=520 \n" ); document.write( "250+270=520 \n" ); document.write( "520=520\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |