document.write( "Question 885615: 2 cars start 15 miles apart they travel in a straight line towards each other. If they are going at 20 and 55 miles per hour respectively, how long does it take for them to meet up? \n" ); document.write( "

Algebra.Com's Answer #535298 by josmiceli(19441) $\"\"$ $\"About$

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Think of this as one car standing still
\n" ); document.write( "and the other traveling at the sum
\n" ); document.write( "of their speeds
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\n" ); document.write( "Let $\"+t+\"$ = the time in hrs
\n" ); document.write( " $\"+15+=+%28+20+%2B+55+%29+%2A+t+\"$
\n" ); document.write( " $\"+15+=+75t+\"$
\n" ); document.write( " $\"+t+=+15%2F75+\"$
\n" ); document.write( " $\"+t+=+1%2F5+\"$ hrs
\n" ); document.write( " $\"+t+=+%28+1%2F5+%29%2A60+\"$ min
\n" ); document.write( " $\"+t+=+12+\"$ min
\n" ); document.write( "It takes 12 minutes for them to meet\r
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