Decide Whether or Not the Matrices Are Inverses of Each $\left[ \begin{array} { l l } 9 & 4 \\ 4 & 4 \end{array} \right]$

question 37

Multiple Choice

Decide whether or not the matrices are inverses of each other.
- $\left[ \begin{array} { l l } 9 & 4 \\ 4 & 4 \end{array} \right]$ and $\left[ \begin{array} { r r } - .2 & .2 \\ .2 & - .45 \end{array} \right]$

• A) Yes
• B) \(\mathrm { NO }\)