(a)
The linear system for the number of apples, peaches and pears that was purchased.
(a)
Answer to Problem 60E
The linear system for the number of apples, peaches and pears purchased is
Explanation of Solution
Given:
Rate of apple purchased is
Calculation:
Let us assume that Muriel has bought x pounds of apples, ypounds of peaches and zpounds of pears. Assume 1 pound =100 cents
According to question,
Peaches and pears together cost
Thus, the linear system for the number of apples, peaches and pears purchased is
(b)
To find: The solution of the system using Cramer’s rule.
(b)
Answer to Problem 60E
The number of apples is
Explanation of Solution
Given:
From part (a) the linear system is
Calculation:
Evaluate the left hand side of equation from determinant.
Apply
Expand along
Now replace the terms of first column in the given determinant
Apply
Expand along
Similarly solve for
Solve for
Now, from Cramer’s rule for solution of coordinates,
Similarly,
Similarly,
Thus, the apples
Chapter 10 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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