Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
1st Edition
ISBN: 9780078682278
Author: McGraw-Hill, Berchie Holliday
Publisher: Glencoe/McGraw-Hill
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Chapter 10.8, Problem 39E
To determine

To find: the solutions algebraically for the system of equations and then verify the answer by graphing each system.

Expert Solution & Answer
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Answer to Problem 39E

  (3,4) and (4,3)

Explanation of Solution

Given information:

  x=y+1..........(1)

  xy=12..........(2)

  y2=25x2..........(3)

Calculation:

Substitute x in equation (2) and solve y as follows:

  (y+1)y=12   [Put x=y+1]y2+y=12y2y=12      [Divide each side by 1]y2y12=0        [Subtract 12 from each side]y=(1)±(1)24(1)(12)2(1)            [Using b±b24ac2a]=1±492=1±72y=4 or 3                                                                                                             ...(3)

Substitute the value of y in equation (1) and solve x as follows:

  x=(3)+1          [For y=3]=4x=(4)+1          [For y=4]=3

Thus, the point of intersection of equation (1) and (2) are (3,4) and (4,3) .

Substitute each value of y in equation (3) and solve x as shown below.

  y2=25x2x=±25y2x=±25(3)2          [For y=3]=±4x=±25(4)2          [For y=4]=±3

The point of intersection of equation (3) and (2) are (3,±4) and (4,±3) .

The common point of intersection in all the equations gives for the given system. Thus, the solutions are (3,4) and (4,3) .

Now use graphing calculator to plot equation (1) , (2) and (3) on same screen as shown below.

  Advanced Mathematical Concepts: Precalculus with Applications, Student Edition, Chapter 10.8, Problem 39E

The solution (x,y) obtained from the graph i.e. (3,4) and (4,3) which are same as the calculated solutions. Thus, the solutions are verified.

Chapter 10 Solutions

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition

Ch. 10.1 - Prob. 11CFUCh. 10.1 - Prob. 12ECh. 10.1 - Prob. 13ECh. 10.1 - Prob. 14ECh. 10.1 - Prob. 15ECh. 10.1 - Prob. 16ECh. 10.1 - Prob. 17ECh. 10.1 - Prob. 18ECh. 10.1 - Prob. 19ECh. 10.1 - Prob. 20ECh. 10.1 - Prob. 21ECh. 10.1 - Prob. 22ECh. 10.1 - Prob. 23ECh. 10.1 - Prob. 24ECh. 10.1 - Prob. 25ECh. 10.1 - Prob. 26ECh. 10.1 - Prob. 27ECh. 10.1 - Prob. 28ECh. 10.1 - Prob. 29ECh. 10.1 - Prob. 30ECh. 10.1 - Prob. 31ECh. 10.1 - Prob. 32ECh. 10.1 - Prob. 33ECh. 10.1 - Prob. 34ECh. 10.1 - Prob. 35ECh. 10.1 - Prob. 36ECh. 10.1 - Prob. 37ECh. 10.1 - Prob. 38ECh. 10.1 - Prob. 39ECh. 10.1 - Prob. 40ECh. 10.1 - Prob. 41ECh. 10.1 - Prob. 42ECh. 10.1 - Prob. 43ECh. 10.1 - Prob. 44ECh. 10.2 - Prob. 1CFUCh. 10.2 - Prob. 2CFUCh. 10.2 - Prob. 3CFUCh. 10.2 - Prob. 4CFUCh. 10.2 - Prob. 5CFUCh. 10.2 - Prob. 6CFUCh. 10.2 - Prob. 7CFUCh. 10.2 - Prob. 8CFUCh. 10.2 - Prob. 9CFUCh. 10.2 - Prob. 10CFUCh. 10.2 - Prob. 11CFUCh. 10.2 - Prob. 12CFUCh. 10.2 - Prob. 13CFUCh. 10.2 - Prob. 14CFUCh. 10.2 - Prob. 15ECh. 10.2 - 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