Encode and Decode Messages
-Use the Coding Matrix $A = \left[ \begin{array} { l l } 2 & 1 \\ 5 & 3 \end{array} \right]$

question 105

Multiple Choice

Encode and Decode Messages
-Use the coding matrix $A = \left[ \begin{array} { l l } 2 & 1 \\ 5 & 3 \end{array} \right]$ and its inverse $A ^ { - 1 } = \left[ \begin{array} { r r } 3 & - 1 \\ - 5 & 2 \end{array} \right]$ to decode the cryptogram $\left[ \begin{array} { r r } 9 & 6 \\ 25 & 17 \end{array} \right]$ .

• A) BEAD
• B) CARE
• C) DARE
• D) CURB