document.write( "Question 993929: The gas tank on your car holds 21 gallons. If you get between 16 and 18 miles
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Algebra.Com's Answer #613093 by Theo(13342)\"\" \"About 
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x is the number of miles you can go on a tank of gas.\r
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\n" ); document.write( "\n" ); document.write( "if you get 16 miles per gallon, then x = 21 * 16.\r
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\n" ); document.write( "\n" ); document.write( "if you get 18 miles per gallon, than x = 21 * 18.\r
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\n" ); document.write( "\n" ); document.write( "x has to be greater than or equal to 21 * 16.\r
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\n" ); document.write( "\n" ); document.write( "x has to be less than or equal to 21 * 18.\r
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\n" ); document.write( "\n" ); document.write( "if x is greater than or equal to 16 * 21, then 16 * 21 must be less than or equal to x.\r
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\n" ); document.write( "\n" ); document.write( "you can now write your inequality as 16 * 21 is less than or equal to x which is less than or equal to 18 * 21.\r
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\n" ); document.write( "\n" ); document.write( "the symbol for less than or equal to is <=.\r
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\n" ); document.write( "\n" ); document.write( "your inequality can therefore be expressed as 16 * 21 <= x <= 21 * 18.\r
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\n" ); document.write( "\n" ); document.write( "simplify this further to get:\r
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\n" ); document.write( "\n" ); document.write( "336 <= x <= 378\r
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\n" ); document.write( "\n" ); document.write( "this says that the minimum number of miles you will travel on a tank of gas is 336 miles and the maximum number of miles you will travel on the same tank of gas is 378.\r
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