Find the Inverse of the Matrix, If It Exists
- $A = \left[ \begin{array} { r r } - 5 & - 5 \\ 2 & 2 \end{array} \right]$

question 80

Multiple Choice

Find the inverse of the matrix, if it exists
- $A = \left[ \begin{array} { r r } - 5 & - 5 \\ 2 & 2 \end{array} \right]$

• A) A is not invertible
• B)
• \[\left[ \begin{array} { c c }
• \frac { 2 } { 21 } & \frac { 5 } { 21 } \\
• - \frac { 2 } { 21 } & - \frac { 5 } { 21 }
• \end{array} \right]\]
• C)
• \[\left[ \begin{array} { c c }
• - \frac { 2 } { 21 } & - \frac { 5 } { 21 } \\
• \frac { 2 } { 21 } & \frac { 5 } { 21 }
• \end{array} \right]\]
• D)
• \[\left[ \begin{array} { l }
• \frac { 2 } { 21 } - \frac { 5 } { 21 } \\
• \frac { 2 } { 21 } - \frac { 5 } { 21 }
• \end{array} \right]\]

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Definitions:

Tax Revenue

The income that is collected by governments through taxation, which supports public spending and services.

Government

The organization, or system by which a community or nation is governed, responsible for creating and enforcing laws.

Consumer Surplus

The offset between what customers are willing and able to pay for a service or product and what they actually expend.

Consumer Surplus

The distinction between the ideal spending amount of consumers on a good or service and their actual expenditure.