
Concept explainers
(a)
To find: The system of equations to model the situation.
(a)

Answer to Problem 15STP
The system of equations to model the situation is given below.
Explanation of Solution
Given:
The cost of each jet printer is
The cost of each laser printer is
The system of equation that model the given situation is given as:
So the system of equations are shown above.
(b)
To find: The matrix equation form that can use to solve the above system of equation.
(b)

Answer to Problem 15STP
The matrix equation is given below.
Explanation of Solution
The matrix of the system’s coefficient
The system can be written in a matrix equation form is given as:
Therefore the matrix equation is given above.
(c)
To find: The inverse of the coefficient matrix and hence solve the matrix equation.
(c)

Answer to Problem 15STP
The answer is given below.
Explanation of Solution
The inverse of coefficient
The system can be rewritten as:
Further simplified as:
Further simplified as:
Chapter 5 Solutions
Algebra 2
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