Question
MAT540 Homework Week 6
Page 1 of 2
MAT540
Week 6 Homework
Chapter 2

1. A Cereal Company makes a cereal from several ingredients. Two of the ingredients, oats and rice,
provide vitamins A and B. The company wants to know how many ounces of oats and rice it should
include in each box of cereal to meet the minimum requirements of 45 milligrams of vitamin A and
13 milligrams of vitamin B while minimizing cost. An ounce of oats contributes 10 milligrams of
vitamin A and 2 milligram of vitamin B, whereas an ounce of rice contributes 6 milligrams of A
and 3 milligrams of B. An ounce of oats costs \$0.06, and an ounce of rice costs \$0.03.
a. Formulate a linear programming model for this problem.
b. Solve the model by using graphical analysis.
2. A Furniture Company produces chairs and tables from two resources- labor and wood. The
company has 125 hours of labor and 45 board-ft. of wood available each day. Demand for chairs is
limited to 5 per day. Each chair requires 7 hours of labor and 3.5 board-ft. of wood, whereas a table
requires 14 hours of labor and 7 board-ft. of wood. The profit derived from each chair is \$325 and
from each table, \$120. The company wants to determine the number of chairs and tables to produce
each day in order to maximize profit. Formulate a linear programming model for this problem.
a. Formulate a linear programming model for this problem.
b. Solve the model by using graphical analysis. (Do not round the answers)
c. How much labor and wood will be unused if the optimal numbers of chairs and tables are
produced?
3. Kroeger supermarket sells its own brand of canned peas as well as several national brands. The
store makes a profit of \$0.28 per can for its own peas and a profit of \$0.19 for any of the national
brands. The store has 6 square feet of shelf space available for canned peas, and each can of peas
takes up 9 square inches of that space. Point-of-sale records show that each week the store never
sales more than half as many cans of its own brand as it does of the national brands. The store
wants to know how many cans of its own brand of peas of peas and how many cans of the national
brands to stock each week on the allocated shelf space in order to maximize profit.
a. Formulate a linear programming model for this problem.
b. Solve the model by using graphical analysis.

MAT540 Homework Week 6
Page 2 of 2 4. Solve the following linear programming model graphically:
Minimize Z=8X1 + 6X2
Subject to
4X1 + 2X2 20
-6X1 + 4X2
X1 + X2
X1 , X2

P1

(a) Define the decision variables and write the linear programming model for the problem in the space provided below

(b) Sketch the feasible region. Give your answer in the worksheet named P1-Graph

(i) You can use QM for Windows to get the graph, copy and paste it onto the worksheet named P1-Graph OR

(ii) You can sketch the feasible region on paper, scan and save it in your computer.

Copy the image (i.e. graph) and paste it onto the worksheet named P1-Graph

(c’) Write all the vertices of the feasible region and identify the optimal vertex

What is the optimal objective function value?

Vertex
x1
x2
x1
x2

1
optimal vertex

2

3
optimal objective fuction value

P1-Graph

P2

(a) Define the decision variables and write the linear programming model for the problem in the space provided below

(b) Sketch the feasible region. Give your answer in the worksheet named P2-Graph

(i) You can use QM for Windows to get the graph, copy and paste it onto the worksheet named P2-Graph OR

(ii) You can sketch the feasible region on paper, scan and save it in your computer.

Copy the image (Graph) and paste it onto the worksheet named P2-Graph

Write all the vertices of the feasible region and identify the optimal vertex

What is the optimal objective function value?

Vertex
x1
x2
x1
x2

1
optimal vertex

2

3
optimal objective fuction value

4

5

(c’)
How much labor and wood will be unused if the optimal number of chairs and tables are used?

P2-Graph

P3

(a) Define the decision variables and write the linear programming model for the problem in the space provided below

(b) Sketch the feasible region. Give your answer in the worksheet named P4-Graph

(i) You can use QM for Windows to get the graph, copy and paste it onto the worksheet named P4-Graph OR

(ii) You can sketch the feasible region on paper, scan and save it in your computer.

Copy the image (Graph) and paste it onto the worksheet named P4-Graph

(c’) Write all the vertices of the feasible region and identify the optimal vertex

What is the optimal objective function value?

Vertex
x1
x2
x1
x2

1
optimal vertex

2

3
optimal objective fuction value

P3-Graph

P4

(a) Sketch the feasible region. Give your answer in the worksheet named P5-Graph

(i) You can use QM for Windows to get the graph, copy and paste it onto the worksheet named P5-Graph OR

(ii) You can sketch the feasible region on paper, scan and save it in your computer.

Copy the image (Graph) and paste it onto the worksheet named P5-Graph

(b) Write all the vertices of the feasible region and identify the optimal vertex

What is the optimal objective function value?

Vertex
x1
x2
x1
x2

1
optimal vertex

2

3
optimal objective fuction value

P4-Graph

...

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