The chart below shows the amount spent by three U.S. airlines to fly one available seat one mile in the fourth quarter of 2000.
Airline United American SouthWest Cost11.3
cents11.0
cents7.8
cents?
Suppose that, on a 3000-mile New York-Los Angeles flight, United, American and SouthWest flew a total of 150 empty seats, costing them a total of $47,430. If United had three times as many empty seats as American, how many empty seats did each of these three airlines carry on its flight?
United__________American__________SouthWest__________
What will be an ideal response?
90; 30; 30
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A. 7(3x + 5)(9x2 + 25) B. 7(3x + 5)(9x2 - 15x + 25) C. 7(3x - 5)(9x2 + 15x + 25) D. 7(27x3 + 125)
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A. 
B. 
C. 
D. 
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