document.write( "Question 121090: If Jim road his bike 6 miles per hour one way and Sarah walked 1/3 of a mile per hour the other way, how long would it take them to be 21 miles apart? \n" ); document.write( "

Algebra.Com's Answer #88846 by josmiceli(19441) $\"\"$ $\"About$

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For each one, d = rxt
\n" ); document.write( "and the sum of their distances needs to be 21 mi
\n" ); document.write( "For Jim:
\n" ); document.write( " $\"d+=+6t\"$
\n" ); document.write( "For Sarah:
\n" ); document.write( " $\"d+=+%281%2F3%29t\"$
\n" ); document.write( " $\"6t+%2B+%281%2F3%29t+=+21\"$
\n" ); document.write( "multiply both sides by 3
\n" ); document.write( " $\"18t+%2B+t+=+63\"$
\n" ); document.write( " $\"19t+=+63\"$
\n" ); document.write( " $\"t+=+3.316\"$ hrs answer
\n" ); document.write( "or
\n" ); document.write( " $\"3\"$ hrs $\".316%2A60\"$ min
\n" ); document.write( " $\"3\"$ hrs $\"19\"$ min
\n" ); document.write( "I can check this. I should get the same answer
\n" ); document.write( "if Jim alone went 21 miles at 6.333 mi/hr
\n" ); document.write( " $\"21+=+6.333%2A3.316\"$
\n" ); document.write( " $\"21+=+20.999988\"$ close enough \n" ); document.write( "

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