document.write( "Question 166412: Can someone please help me with the following problem?\r
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document.write( "A plane has a cruising speed of 280 miles per hour and the wind velocity is 40 miles per hour. How far can the plane fly and return in 7 hours?\r
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document.write( "So far I have begun to make a chart to help solve the problem, but I am just very confused. \n" );
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Algebra.Com's Answer #122647 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! d=rt __ distance out is the same as distance back\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the total time is 7hr __ if t is the time out, then 7-t is the time back\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "rate with the wind is 280+40 or 320\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "rate back is 280-40 or 240\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "320 * t = 240 * (7-t) __ 320t=1680-240t __ 560t=1680 __ t=3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting __ d=320(3) __ d=960 (one way) \n" ); document.write( " |