a)
To find: the system of equations to model the situation.
a)
Answer to Problem 9STP
The system of equations to model the situation is,
Explanation of Solution
Given:
The cost of 5 notebooks and 3 pens is $9.75. The cost of 4 notebooks and 6 pens is $10.50.
Let the number of notebooks are x and number of pens are y .
So, the system of equations to model the situation is,
b)
To find: the solution of system of equations and state how much each item cost.
b)
Answer to Problem 9STP
The cost of one notebook is $1.5 and the cost of one pen is $0.75.
Explanation of Solution
Given:
The cost of 5 notebooks and 3 pens is $9.75. The cost of 4 notebooks and 6 pens is $10.50.
The system of equations to model the situation is,
Applying substitution method,
Substitution ‘ x’ in the second equation,
Now, finding ‘ x’ ,
So, the cost of one notebook is $1.5 and the cost of one pen is $0.75.
Chapter 9 Solutions
Algebra 1
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