document.write( "Question 1196949: A 831-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, the average speed was 109 mph. For the remainder of the trip, the average speed was 126 mph. How long did the plane fly at each speed?
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document.write( "109 mph hr
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document.write( "126 mph hr \n" );
document.write( "
Algebra.Com's Answer #829994 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! A 831-mile, 7-hour plane trip was flown at two speeds. For the first part of the trip, the average speed was 109 mph. For the remainder of the trip, the average speed was 126 mph. How long did the plane fly at each speed? \n" ); document.write( "--------------------- \n" ); document.write( "t = time at 109 \n" ); document.write( "--- \n" ); document.write( "109t + 126*(7-t) = 831 \n" ); document.write( "Solve for t, etc \n" ); document.write( " |