Matrices

Front

What comes first when you are stating the dimensions of a matrix?

Back

Row

Front

What is the result of subtracting the following matrices: \[ \begin{bmatrix} -5 & 8 & 3 \ 10 \end{bmatrix} - \begin{bmatrix} 2 & 5 & -8 \ 3 \end{bmatrix} \]?

Back

\[ \begin{bmatrix} -9 & 8 & 3 \ 2 \end{bmatrix} \]

Front

Write the following system of equations as an augmented matrix: \[ 2x + 3y = 5, \ 4x - y = 1 \]

Back

\[ \begin{bmatrix} 2 & 3 & | & 5 \ 4 & -1 & | & 1 \end{bmatrix} \]

Front

In Matrix R, what element is a_{23}?

Back

6

Front

Find B*A using the graphing calculator if B = \[ \begin{bmatrix} 1 & 2 \ 3 & 4 \end{bmatrix} \] and A = \[ \begin{bmatrix} 5 & 6 \ 7 & 8 \end{bmatrix} \].

Back

\[ \begin{bmatrix} 47 & 30 \ 9 & 5 \end{bmatrix} \]

Front

What is the definition of a matrix?

Back

A matrix is a rectangular array of numbers arranged in rows and columns.

Front

What is the order of a matrix with 3 rows and 4 columns?

Back

3 x 4

Front

What is the determinant of a 2x2 matrix \[ \begin{bmatrix} a & b \ c & d \end{bmatrix} \]?

Back

ad - bc

Front

What is the identity matrix of order 3?

Back

\[ \begin{bmatrix} 1 & 0 & 0 \ 0 & 1 & 0 \ 0 & 0 & 1 \end{bmatrix} \]

Front

How do you add two matrices?

Back

Add corresponding elements from each matrix.