document.write( "Question 154399This question is from textbook
\n" ); document.write( ": Two planes left an airport at noon. One flew east at a certain speed and the other flew west at twice the speed. The plains were 2700 miles apart in 3 hours. How fast was each plane flying? \n" ); document.write( "

Algebra.Com's Answer #113754 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!
Remember:
\n" ); document.write( "Speed of the 2 planes in $\"miles%2Fhour\"$
\n" ); document.write( " $\"Plane1=P%5B1%5D=+x%28mi%2Fhr%29\"$
\n" ); document.write( " $\"Plane2=P%5B2%5D=2x%28mi%2Fhr%29\"$ , twice the speed of $\"P%5B1%5D\"$
\n" ); document.write( "As they left the airport, the 2 plane made a combined distance of $\"2700miles\"$ in $\"3hours\"$ . So,
\n" ); document.write( " $\"P%5B1%5D%2BP%5B2%5D=2700miles%2F3hours\"$ -------------------------> working eqn
\n" ); document.write( " $\"x%2B2x=cross%282700%29900%2Fcross%283%29\"$
\n" ); document.write( " $\"3x=900%28mi%2Fhr%29\"$
\n" ); document.write( " $\"cross%283%29x%2Fcross%283%29=cross%28900%29300%2Fcross%283%29\"$
\n" ); document.write( " $\"x=300%28mi%2Fhr%29\"$ ----------------------------> speed of $\"P%5B1%5D\"$
\n" ); document.write( "Also, $\"P%5B2%5D=2%2A300=600%28mi%2Fhr%29\"$ , speed of $\"P%5B2%5D\"$
\n" ); document.write( "In doubt? Go back working eqn:
\n" ); document.write( " $\"300%2B2%28300%29=2700%2F3\"$
\n" ); document.write( " $\"300%2B600=900\"$
\n" ); document.write( " $\"900%28mi%2Fhr%29=900%28mi%2Fhr%29\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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