document.write( "Question 452379: A plane flies 500 miles with the wind and 340 miles against the wind in the same length of time. If
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document.write( "the speed of the wind is 20 mph, what is the speed of the plane in still air? \n" );
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Algebra.Com's Answer #311115 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! 500/s+20=340/s-20 \n" ); document.write( "340(s+20)=500(s-20) \n" ); document.write( "340s+6800=500s-10000 \n" ); document.write( "16800=160s \n" ); document.write( "s=105 \n" ); document.write( "The still air speed of the plane is 105 mph.. \n" ); document.write( " |