document.write( "Question 895981: two planes leave an airport at the same time one flying east the other flying west the east bound plane travels 110 mph slower they are 1540 mi apart after 2 hr find the speed of each plane \n" ); document.write( "

Algebra.Com's Answer #543150 by josmiceli(19441) $\"\"$ $\"About$

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Think of one plane as standing still and the
\n" ); document.write( "other plane flying at the sum of their speeds
\n" ); document.write( "Let $\"+s+\"$ = the speed of the faster plane
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\n" ); document.write( " $\"+1540+=+%28+s+%2B+s+-+110+%29%2A2+\"$
\n" ); document.write( " $\"+1540+=+4s+-+220+\"$
\n" ); document.write( " $\"+4s+=+1760+\"$
\n" ); document.write( " $\"+s+=+440+\"$
\n" ); document.write( " $\"+s+-+110+=+330+\"$
\n" ); document.write( "------------------
\n" ); document.write( "The west bound plane flies at 440 mi/hr
\n" ); document.write( "The east bound plane flies at 330 mi/hr
\n" ); document.write( "check:
\n" ); document.write( "East bound train:
\n" ); document.write( " $\"+d%5B1%5D+=+440%2A2+\"$
\n" ); document.write( " $\"+d%5B1%5D+=+880+\"$ mi
\n" ); document.write( "-------------------
\n" ); document.write( "West bound train:
\n" ); document.write( " $\"+d%5B2%5D+=+330%2A2+\"$
\n" ); document.write( " $\"+d%5B2%5D+=+660+\"$ mi
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+880+%2B+660+\"$
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+1540+\"$ mi
\n" ); document.write( "OK\r
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