document.write( "Question 856331: Find the ordered pair where the maximum value occurs for the equation C=12x-4y given the following constraints:\r
\n" ); document.write( "\n" ); document.write( "y>-(greater than or equal to)4
\n" ); document.write( "x>-(greater than or equal to )1
\n" ); document.write( "x+2y<-(less than or equal to)16
\n" ); document.write( "y-x<-(less than or equal to) 5\r
\n" ); document.write( "\n" ); document.write( "A)(10,1)
\n" ); document.write( "B(8,4)
\n" ); document.write( "C(2,7)
\n" ); document.write( "D)(1,4)
\n" ); document.write( "

Algebra.Com's Answer #516010 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Just as a note, <= is less than or equal and >= is greater t
\n" ); document.write( "\"x%2B2y%3C=16\"
\n" ); document.write( "\"graph%28300%2C300%2C-2%2C10%2C-2%2C10%2Cy%3C=%2816-x%29%2F2%29\"
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "\"y-x%3C=5\"
\n" ); document.write( "\"graph%28300%2C300%2C-2%2C10%2C-2%2C10%2Cy%3C=x%2B5%29\"
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "First graph the region.
\n" ); document.write( "
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Find the points of intersection.
\n" ); document.write( "(1,4)
\n" ); document.write( "(1,6)
\n" ); document.write( "(2,7)
\n" ); document.write( "(8,4)
\n" ); document.write( "First graph the region.
\n" ); document.write( "
\n" ); document.write( "The min and max values occur at one of these vertices.
\n" ); document.write( "\"C=12x-4y=12%281%29-4%284%29=12-16=-4\"
\n" ); document.write( "\"C=12x-4y=12%281%29-4%286%29=12-24=-12\"
\n" ); document.write( "\"C=12x-4y=12%282%29-4%287%29=24-28=-4\"
\n" ); document.write( "\"C=12x-4y=12%288%29-4%284%29=96-16=80\"
\n" ); document.write( "
\n" );