Question Source My Open Math Math 125 Finite Math Section 43
Question Source: My Open Math (Math 125 Finite Math) Section 4.3: Linear Programming - The Simplex Method.
Consider the linear programming problem:
Maximize P=10x+40y
{2x+y100
{80x+10y500
{30x+10y2000
{x0
{y0
Use the simplex method to solve the problem. Use s, t, and u as your slack variables for the first, second, and third inequalities respectively. Use the final simplex tableau to identify the values below.
x =
y =
s =
t =
u =
P =
Solution
Maximize p = 10x+ 40y subject to
2x +y <=100,
80x +10y<=500,
30x +10y<=2000,
x>=0,
y>=0
Tableau #1
x y s1 s2 s3 s4 s5 p
2 1 1 0 0 0 0 0 100
80 10 0 1 0 0 0 0 500
30 10 0 0 1 0 0 0 2000
1 0 0 0 0 -1 0 0 0
0 1 0 0 0 0 -1 0 0
-10 -40 0 0 0 0 0 1 0
Tableau #2
x y s1 s2 s3 s4 s5 p
2 1 1 0 0 0 0 0 100
80 10 0 1 0 0 0 0 500
30 10 0 0 1 0 0 0 2000
-1 0 0 0 0 1 0 0 0
0 1 0 0 0 0 -1 0 0
-10 -40 0 0 0 0 0 1 0
Tableau #3
x y s1 s2 s3 s4 s5 p
2 1 1 0 0 0 0 0 100
80 10 0 1 0 0 0 0 500
30 10 0 0 1 0 0 0 2000
-1 0 0 0 0 1 0 0 0
0 -1 0 0 0 0 1 0 0
-10 -40 0 0 0 0 0 1 0
Tableau #4
x y s1 s2 s3 s4 s5 p
-6 0 1 -0.1 0 0 0 0 50
8 1 0 0.1 0 0 0 0 50
-50 0 0 -1 1 0 0 0 1500
-1 0 0 0 0 1 0 0 0
8 0 0 0.1 0 0 1 0 50
310 0 0 4 0 0 0 1 2000
Optimal Solution: p = 2000; x = 0, y = 50

