document.write( "Question 810012: Any help is appreciated, I cant seem to set this up correctly, even using excel I do not get the correct answer.
\n" ); document.write( "Sandy rides her bike at a speed of 5 feet a second and Danny rides his bike at a speed of 10 feet a second. If Sandy gets a 90 second head start, how many seconds will Sandy ride her bike before Danny catches up to her?
\n" ); document.write( "Thanks so much for any help!! \n" ); document.write( "
Algebra.Com's Answer #487898 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Sandy rides her bike at a speed of 5 feet a second and Danny rides his bike at a speed of 10 feet a second. If Sandy gets a 90 second head start, how many seconds will Sandy ride her bike before Danny catches up to her?
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\n" ); document.write( "Sandy DATA:
\n" ); document.write( "rate = 5 ft/sec ; time = x seconds ; distance = 5x ft
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\n" ); document.write( "Danny DATA:
\n" ); document.write( "rate = 10 ft/sec ; time = x-90 seconds ; distance = 10(x-90) ft
\n" ); document.write( "--------
\n" ); document.write( "Equation:
\n" ); document.write( "distance = distance
\n" ); document.write( "5x = 10x-900
\n" ); document.write( "5x = 900
\n" ); document.write( "x = 180 seconds = 3 minutes (Sandy time)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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