document.write( "Question 306331: if a plane can travel 450 miles per hour with the wind and 410 miles per hour against the wind, find the speed of the plane still in the air \n" ); document.write( "
Algebra.Com's Answer #219249 by scott8148(6628)\"\" \"About 
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p + w = 450\r
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\n" ); document.write( "\n" ); document.write( "p - w = 410\r
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\n" ); document.write( "\n" ); document.write( "adding equations ___ 2p = 860 ___ p = 430
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