Concept explainers
To calculate: The cost of the notebook and pen.
Answer to Problem 20SGR
The notebook is $2.50 and cost of pen is $1.25.
Explanation of Solution
Given information:
The cost of 3 notebooks and 5 pens is $13.75. The cost of a notebook is $1.25 more than a pen.
Calculation:
Consider the provided information that the cost of 3 notebooks and 5 pens is $13.75. The cost of a notebook is $1.25 more than a pen.
Consider the system of equations that represent the situation above. Let x denote cost of notebook and y denote cost of pen.
Use the method of substitution to solve the system above.
From the equation
Now substitute
Now, substitute
Therefore, solution is the coordinate pair,
Thus, the cost of notebook is $2.50 and cost of pen is $1.25.
Chapter 3 Solutions
Algebra 2
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