Find $\mathrm{M}_{12}$.
\[
A=\left[\begin{array}{rrr}
5 & 5 & 7 \\
3 & 3 & -2 \\
0 & 1 & 5
\end{array}\right]
\]

Answer

Expert–verified

Hide Steps

Answer

Final Answer: $\boxed{5}$

Steps

Step 1 ：Given matrix A is \[A=\left[\begin{array}{rrr} 5 & 5 & 7 \ 3 & 3 & -2 \ 0 & 1 & 5 \end{array}\right]\]

Step 2 ：The element in the first row and second column of matrix A is denoted as $M_{12}$

Step 3 ：So, $M_{12} = 5$

Step 4 ：Final Answer: $\boxed{5}$