document.write( "Question 1102168: Suppose that the weight (in pounds) of an airplane is a linear function of the amount of fuel (in gallons) in its tank. When carrying 18 gallons of fuel, the airplane weighs 1999 pounds. When carrying 50 gallons of fuel, it weighs
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Algebra.Com's Answer #716831 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "Airplane + 50 gallons of fuel weights 2175 pounds.   (1)\r\n" );
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document.write( "Airplane + 18 gallons of fuel weights 1999 pounds.   (2)\r\n" );
document.write( "----------------------------------------------------------Subtract (2) from (1). You will get\r\n" );
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document.write( "           32 gallons of fuel weight 2175 - 1999 = 180 pounds.  ====>\r\n" );
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document.write( "====>       1 gallon of fuel weights  = 5.625 pounds.\r\n" );
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document.write( "(Airplane + 60 gallons of fuel)'s weight = (Airplane + 50 gallons of fuel weight) + weight of 10 gallons of fuel = \r\n" );
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document.write( "                                            2175 + 10*5.625 =  2231.25 pounds.\r\n" );
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document.write( "Answer.  Airplane with 60 gallons of fuel weights 2231.25 pounds.\r\n" );
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