document.write( "Question 711058: A jet liner takes 1.2 hours longer to fly from Paris, France to New York, New York (3600 miles) than to return. If the jet cruises at 550 mph in still air, what is the average rate of the wind blowing in the direction of New York, New York to Paris, France? \n" ); document.write( "
Algebra.Com's Answer #437273 by lwsshak3(11628)\"\" \"About 
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A jet liner takes 1.2 hours longer to fly from Paris, France to New York, New York (3600 miles) than to return. If the jet cruises at 550 mph in still air, what is the average rate of the wind blowing in the direction of New York, New York to Paris, France?
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\n" ); document.write( "let x=average rate of wind
\n" ); document.write( "speed of jet liner, Paris to New York,=550-x
\n" ); document.write( "speed of jet liner, New York to Paris=550+x
\n" ); document.write( "Travel time=distance/speed
\n" ); document.write( "3600/(550+x)-3600/(550-x)=1.2
\n" ); document.write( "LCD: (550+x)(550-x)
\n" ); document.write( "3600(550-x)-3600(550+x)=1.2(550+x)(550-x)
\n" ); document.write( "3600*550-3600x-3600*550-3600x=1.2(550^2-x^2)
\n" ); document.write( "-7200x=1.2*550^2-1.2x^2
\n" ); document.write( "-6000x=550^2-x^2
\n" ); document.write( "x^2-6000x-302500=0
\n" ); document.write( "(x-50)(x+6050)=0
\n" ); document.write( "x=50
\n" ); document.write( "average rate of wind=50 mph \n" ); document.write( "
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