Chapter 3.7, Problem 1PE

1. A ________________ is a rectangular array of numbers. The order of the matrix is m x n where m is the number of ___________ and n is the number of ____________.
2. A matrix that has exactly one column is called a ______________ matrix. A matrix that has exactly _______________ row is called a row matrix and a matrix with the same number od rows and columns is called a _____________ matrix.
3. Given the system of equations shown, matrix A is called the ___________ matrix. The matrix B is called the _____________ matrix.

$\begin{array}{l}3x-2y=6\\ 4x+5y=9\end{array}$

$A=\left(\begin{array}{cc}3& -2\\ 4& 5\end{array}\right)$

$B=\left(\begin{array}{ccc}3& -2& 6\\ 4& 5& 9\end{array}\right)$

The matrix A is said to be written in reduced ___________ form.

$A=\left(\begin{array}{ccc}1& 0& 8\\ 0& 1& 2\end{array}\right)$