document.write( "Question 729155: Two cyclists competed in a 5 mile bicycle race. The more experienced cyclist gave the novice cyclist a head start of .6 mile and still won the race by 2 minutes. If the experienced cyclist's average speed was 3 mph faster than the novice's average speed, what was the novice's average speed?\r
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\n" ); document.write( "\n" ); document.write( "Can you please show the work.
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Algebra.Com's Answer #445774 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Start a stop watch when the experienced cyclist leaves.
\n" ); document.write( "Stop it when that cyclist finishes
\n" ); document.write( "Let \"+t+\" = experienced cyclist's time to finish
\n" ); document.write( "Let \"+s+\" = experienced cyclists average speed
\n" ); document.write( "---------------
\n" ); document.write( "Novice cyclist's equation:
\n" ); document.write( "(1) \"+5+-+.6+=+%28+s+-+3+%29%2A%28+t+%2B+2%2F60+%29+\" ( 2 min is converted to hours )
\n" ); document.write( "Experienced cyclist's equation:
\n" ); document.write( "(2) \"+5+=+s%2At+\"
\n" ); document.write( "--------------
\n" ); document.write( "(1) \"+4.4+=+s%2At+-+3t+%2B+%281%2F30%29%2As+-+1%2F10+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+s+=+5%2Ft+\"
\n" ); document.write( "(1) \"+4.4+=+5+-+3t+%2B+1%2F%286t%29+-+1%2F10+\"
\n" ); document.write( "(1) \"+26.4t+=+30t+-+18t%5E2+%2B+1+-+%283%2F5%29%2At+\"
\n" ); document.write( "(1) \"+18t%5E2+-+3.6t+%2B+.6t+-+1+=+0+\"
\n" ); document.write( "(1) \"+18t%5E2+-+3t+-+1+=+0+\"
\n" ); document.write( "use quadratic formula
\n" ); document.write( "\"+t+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+18+\"
\n" ); document.write( "\"+b+=+-3+\"
\n" ); document.write( "\"+c+=+-1+\"
\n" ); document.write( "\"+t+=+%28-%28-3%29+%2B-+sqrt%28+%28-3%29%5E2+-+4%2A18%2A%28-1%29+%29%29%2F%282%2A18%29+\"
\n" ); document.write( "\"+t+=+%28+3+%2B-+sqrt%28+9+%2B+72+%29%29%2F+36+\"
\n" ); document.write( "\"+t+=+%28+3+%2B-+sqrt%28+81+%29%29%2F+36+\"
\n" ); document.write( "\"+t+=+%28+3+%2B+9+%29+%2F+36+\"
\n" ); document.write( "\"+t+=+12%2F36+\"
\n" ); document.write( "\"+t+=+1%2F3+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+5+=+s%2At+\"
\n" ); document.write( "(2) \"+s+=+5%2F%281%2F3%29+\"
\n" ); document.write( "(2) \"+s+=+15+\"
\n" ); document.write( "\"+s+-+3+=+12+\"
\n" ); document.write( "The novice's speed is 12 mi/hr
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+5+-+.6+=+%28+s+-+3+%29%2A%28+t+%2B+2%2F60+%29+\"
\n" ); document.write( "(1) \"+5+-+.6+=+%28+15+-+3+%29%2A%28+1%2F3+%2B+1%2F30+%29+\"
\n" ); document.write( "(1) \"+4.4+=+12%2A%28+11%2F30+%29+\"
\n" ); document.write( "(1) \"+4.4+=+132%2F30+\"
\n" ); document.write( "(1) \"+132+=+132+\"
\n" ); document.write( "OK\r
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