document.write( "Question 759959: When driving 18 miles, how much time would you save if you drove 60 mph instead of 55 mph? And what is the equation for this problem? \n" ); document.write( "

Algebra.Com's Answer #462377 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+t%5B1%5D+\"$ = time when driving at 60 mi/hr
\n" ); document.write( "Let $\"+t%5B2%5D+\"$ = time when driving at 55 mi/hr
\n" ); document.write( "Driving at 60 mi/hr:
\n" ); document.write( " $\"+18+=+60t%5B1%5D+\"$
\n" ); document.write( " $\"+t%5B1%5D+=+.3+\"$
\n" ); document.write( "Driving at 55 mi/hr:
\n" ); document.write( " $\"+18+=+55t%5B2%5D+\"$
\n" ); document.write( " $\"+t%5B2%5D+=+.3273+\"$
\n" ); document.write( " $\"+t%5B2%5D+-+t%5B1%5D+=+.3273+-+.3+\"$
\n" ); document.write( " $\"+t%5B2%5D+-+t%5B1%5D+=+.0273+\"$
\n" ); document.write( " $\"+.0273%2A60+=+1.636+\"$
\n" ); document.write( " $\"+.636%2A60+=+38+\"$
\n" ); document.write( "By driving 18 mi at 60 instead of 55, you save
\n" ); document.write( "1 min 38 sec
\n" ); document.write( " \n" ); document.write( "

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