document.write( "Question 1141944: Solve the linear programming problem by the method of corners.\r
\n" ); document.write( "\n" ); document.write( "Find the minimum and maximum of P = 5x + 4y subject to
\n" ); document.write( "3x + 5y ≥ 20
\n" ); document.write( "3x + y ≤ 16
\n" ); document.write( "−2x + y ≤ 2
\n" ); document.write( "x ≥ 0, y ≥ 0.
\n" ); document.write( "The minimum is P =
\n" ); document.write( " at
\n" ); document.write( "(x, y) = \r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( "The maximum is P =
\n" ); document.write( " at
\n" ); document.write( "(x, y) = \r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( ".
\n" ); document.write( "

Algebra.Com's Answer #762600 by math_helper(2461)\"\" \"About 
You can put this solution on YOUR website!
When you graph the three inequalities,
\n" ); document.write( "3x + 5y ≥ 20
\n" ); document.write( "3x + y ≤ 16
\n" ); document.write( "−2x + y ≤ 2\r
\n" ); document.write( "\n" ); document.write( "You will get a feasibility region in the shape of a triangle (the triangle is located in Q1 so x>=0 and y>=0 hold). The corners of the triangle are at:
\n" ); document.write( " (2.8,7.6)
\n" ); document.write( " (5,1)
\n" ); document.write( " (0.769,3.538)\r
\n" ); document.write( "\n" ); document.write( "

\n" ); document.write( "Evaluating these (x,y) values in P = 5x + 4y gives:
\n" ); document.write( " (2.8,7.6) 5x + 4y = 44.4 <<< max @ (2.8,7.6)
\n" ); document.write( " (5,1) 5x + 4y = 29
\n" ); document.write( " (0.769,3.538) 5x + 4y = 17.997 <<< min @ (0.769,3.538)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "----------------\r
\n" ); document.write( "\n" ); document.write( "EDIT: Added the Desmos graph (picture) below...\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );