a.
To solve: the given system of linear equations.
a.
Answer to Problem 79E
The given system of linear equations has no solution.
Explanation of Solution
Given:
The projected sales
Calculation:
The system of linear equation is drawn on a graph using graphing utility because the graph of a line always represents every point that is the possible solution of the equation of that line:
From the graph, it is clear that the given system of linear equations has no solution.
b.
To interpret: the meaning of the solution in the context of the problem.
b.
Answer to Problem 79E
The given linear equations are independent to each other.
Explanation of Solution
Given:
The projected sales
The given linear equations are independent to each other and each equation shows the variation of revenue of sales dependent on year of different retailers. There is no relation between the two equation.
c.
To interpret :the meaning of coefficient of the
c.
Explanation of Solution
Given:
The projected sales
Here
d.
To detect: the effect on the previous answers if the coefficient of
d.
Answer to Problem 79E
There is no effect on the previous answers. The system of equations has no solution yet.
Explanation of Solution
Given:
The projected sales
Calculation:
Equal the coefficient of
Plot the graph of linear equations.
Therefore, from graph it is concluded that there is no effect on the previous answers. The system of equations has no solution.
Chapter 7 Solutions
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