document.write( "Question 1086593: Nickola swam at a rate of 3 ​km/hr and ran at a rate of 15 ​km/hr for a total distance traveled of 73.5 km. If he completed the race in 6.5 ​hours, how long did he take to complete each part of the​ race? \n" ); document.write( "
Algebra.Com's Answer #700816 by josmiceli(19441)\"\" \"About 
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Let \"+t+\" = time in hrs to complete the
\n" ); document.write( "swimming part of the race
\n" ); document.write( "\"+6.5+-+t+\" = time in hrs to complete the
\n" ); document.write( "running part
\n" ); document.write( "Let \"+d+\" = distance in km that he swam
\n" ); document.write( "\"+73.5+-+d+\" = distance in km that he ran
\n" ); document.write( "---------------------------------------
\n" ); document.write( "Equation for the swimming part:
\n" ); document.write( "(1) \"+d+=+3t+\"
\n" ); document.write( "Equation for the running part:
\n" ); document.write( "(2) \"+73.5+-+d+=+15%2A%28+6.5+-+t+%29+\"
\n" ); document.write( "---------------------------------------
\n" ); document.write( "Plug (1) into (2)
\n" ); document.write( "(2) \"+73.5+-+3t+=+15%2A%28+6.5+-+t+%29+\"
\n" ); document.write( "(2) \"+73.5+-+3t+=+97.5+-+15t+\"
\n" ); document.write( "(2) \"+12t+=+24+\"
\n" ); document.write( "(2) \"+t+=+2+\"
\n" ); document.write( "and
\n" ); document.write( "\"+6.5+-+t+=+6.5+-+2+\"
\n" ); document.write( "\"+6.5+-+t+=+4.5+\"
\n" ); document.write( "-----------------------
\n" ); document.write( "He took 2 hrs to finish the swimming part
\n" ); document.write( "He took 4.5 hrs to finish the running part
\n" ); document.write( "-----------------------
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+d+=+3t+\"
\n" ); document.write( "(1) \"+d+=+3%2A2+\"
\n" ); document.write( "(1) \"+d+=+6+\" km
\n" ); document.write( "and
\n" ); document.write( "(2) \"+73.5+-+d+=+15%2A%28+6.5+-+t+%29+\"
\n" ); document.write( "(2) \"+73.5+-+d+=+15%2A%28+6.5+-+2+%29+\"
\n" ); document.write( "(2) \"+73.5+-+d+=+15%2A4.5+\"
\n" ); document.write( "(2) \"+73.5+-+d+=+67.5+\"
\n" ); document.write( "(2) \"+d+=+6+\"
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( "
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