If A = (a) (x, y) = (b) (x, y) = then A-1 = 4x - 7y = 44 3x - 5y = 32 - (-5 4x - 7y = -28 3x - 5y = -30 ([ 1) 3). Use this fact and the method of Example 2 to solve the following systems.
If A = (a) (x, y) = (b) (x, y) = then A-1 = 4x - 7y = 44 3x - 5y = 32 - (-5 4x - 7y = -28 3x - 5y = -30 ([ 1) 3). Use this fact and the method of Example 2 to solve the following systems.
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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![If \( A = \begin{pmatrix} 4 & -7 \\ 3 & -5 \end{pmatrix} \), then \( A^{-1} = \begin{pmatrix} -5 & 7 \\ -3 & 4 \end{pmatrix} \). Use this fact and the method of Example 2 to solve the following systems.
(a)
\[
\begin{cases}
4x - 7y = 44 \\
3x - 5y = 32
\end{cases}
\]
\( (x, y) = \begin{pmatrix} \,\,\, \, \end{pmatrix} \)
(b)
\[
\begin{cases}
4x - 7y = -28 \\
3x - 5y = -30
\end{cases}
\]
\( (x, y) = \begin{pmatrix} \,\,\, \, \end{pmatrix} \)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9f36f111-f1bc-4b8c-9508-d8f50a3e95e1%2F71164601-3174-41f3-abac-4445f1269a53%2Fuxqcwp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:If \( A = \begin{pmatrix} 4 & -7 \\ 3 & -5 \end{pmatrix} \), then \( A^{-1} = \begin{pmatrix} -5 & 7 \\ -3 & 4 \end{pmatrix} \). Use this fact and the method of Example 2 to solve the following systems.
(a)
\[
\begin{cases}
4x - 7y = 44 \\
3x - 5y = 32
\end{cases}
\]
\( (x, y) = \begin{pmatrix} \,\,\, \, \end{pmatrix} \)
(b)
\[
\begin{cases}
4x - 7y = -28 \\
3x - 5y = -30
\end{cases}
\]
\( (x, y) = \begin{pmatrix} \,\,\, \, \end{pmatrix} \)
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