Algebra 2
Algebra 2
1st Edition
ISBN: 9780078884825
Author: McGraw-Hill/Glencoe
Publisher: Glencoe/McGraw-Hill School Pub Co
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Chapter 3.4, Problem 11PPS
To determine

To calculate: The coordinates of the vertices of the feasible region formed by graphing the given inequalities 8y2, yx and y3x+10 . Also maximum and minimum values of the function f(x,y)=5x+14y in this region.

Expert Solution & Answer
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Answer to Problem 11PPS

The graph of the given system of inequalities is,

  Algebra 2, Chapter 3.4, Problem 11PPS , additional homework tip  1

The coordinates of the feasible region are (2,2),(4,2),(8,8) and (6,8).

The maximum value of the function is 8 at (4,2) and minimum value of the function is 152 at (8,8).

Explanation of Solution

Given information:

The inequalities 8y2, yx and y3x+10 and the function f(x,y)=5x+14y.

Formula used:

Linear programming is a technique to find the maximum and the minimum value of a given function over a given system of some inequalities, with each inequality representing a constraint. Graph the inequalities and obtain the vertices of the feasible region (solution set). Substitute the coordinates of the feasible region in the function and determine the maximum and the minimum value.

Calculation:

Consider the provided system of inequalities 8y2, yx and y3x+10.

Recall that linear programming is a technique to find the maximum and the minimum value of a given function over a given system of some inequalities, with each inequality representing a constraint. Graph the inequalities and obtain the vertices of the feasible region (solution set).

Graph the given inequalities as,

  Algebra 2, Chapter 3.4, Problem 11PPS , additional homework tip  2

In the above graph, red region represents the inequality y3x+10 , blue region represents the inequality yx and green region represents 8y2.

The feasible region is the region common to all the inequalities which is represented as,

  Algebra 2, Chapter 3.4, Problem 11PPS , additional homework tip  3

The coordinates of the vertices of the feasible region are (2,2),(4,2),(8,8) and (6,8).

Now, to find the maximum and minimum value of the function, substitute the coordinates of the feasible region in the function and determine the maximum and the minimum value.

So, substitute (2,2),(4,2),(8,8) and (6,8) in the function f(x,y)=5x+14y and evaluate the maximum and minimum value as,

  (x,y)5x+14yf(x,y)(2,2)5(2)+14(2)38(4,2)5(4)+14(2)8(8,8)5(8)+14(8)152(6,8)5(6)+14(8)82

From the above table, it is observed that the maximum value of the function is 8 at (4,2) and minimum value of the function is 152 at (8,8).

Thus, graph of the given system of inequalities is,

  Algebra 2, Chapter 3.4, Problem 11PPS , additional homework tip  4

The coordinates of the feasible region are (2,2),(4,2),(8,8) and (6,8) and the maximum value of the function is 8 at (4,2) and minimum value of the function is 152 at (8,8).

Chapter 3 Solutions

Algebra 2

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