Question

Explain the meaning of a 2 by 3 matrix. Give an example from daily life of data you could organize in a matrix.

Answer 1

2X3 matrix looks like this:
\[\left[\begin{matrix}a & b & c \\ d& e&f\end{matrix}\right]\]
It usually represents two equations in three variables:
\[\left[\begin{matrix}a & b & c \\ d& e&f\end{matrix}\right]\left(\begin{matrix}x \\ y \\ z\end{matrix}\right)=\left(\begin{matrix}l \\ m \end{matrix}\right)\]
Means:
\[ax+by+cz=l\]
\[dx+ey+fz=m\]