document.write( "Question 323823: Find the minimum and maximum values of z=2x+3y if possible, for the following set of constraints\r
\n" ); document.write( "\n" ); document.write( "x+y≤9
\n" ); document.write( "-x+y≤5
\n" ); document.write( "2x-y≤14\r
\n" ); document.write( "\n" ); document.write( "Find minimum value & maximum value.\r
\n" ); document.write( "\n" ); document.write( "Please help! :)
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Algebra.Com's Answer #231794 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
First find the feasible region using the constraints.
\n" ); document.write( "Find the intersection points.
\n" ); document.write( "\"9-x=5%2Bx\"
\n" ); document.write( "\"2x=4\"
\n" ); document.write( "\"x=2\"
\n" ); document.write( "\"y=7\"
\n" ); document.write( "(2,7)
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\n" ); document.write( "\"9-x=2x%2B14\"
\n" ); document.write( "\"3x=-5\"
\n" ); document.write( "\"x=-5%2F3\"
\n" ); document.write( "\"y=9-%28-5%2F3%29=32%2F3\"
\n" ); document.write( "(-5/3,32/3)
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\n" ); document.write( "\"2x%2B14=5%2Bx\"
\n" ); document.write( "\"x=-9\"
\n" ); document.write( "\"y=5-9=-4\"
\n" ); document.write( "(-9,-4)
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\n" ); document.write( "The min and max of the function will occur at one of the vertices:
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\n" ); document.write( "(2,7):\"z=2x%2B3y=2%282%29%2B3%287%29=25\"
\n" ); document.write( "(-5/3,32/3):\"z=2x%2B3y=2%28-5%2F3%29%2B3%2832%2F3%29=86%2F3\"
\n" ); document.write( "(-9,-4):\"z=2x%2B3y=2%28-9%29%2B3%28-4%29=-30\"
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\n" ); document.write( "The min value of z of -30 occurs at (-9,-4).
\n" ); document.write( "The max value of z of 86/3 occurs at (-5/3,32/3).
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