| A | B |
|---|
| row matrix | one horizontal row |
| 2x2 matrix | 2 rows and 2 columns |
| det(2x2) | ad - bc |
| matrix | a rectangular array of numbers |
| column | vertical |
| row | horizontal |
| (2,5) | row 2 and column 5 |
| identity matrix | 1's on main diagonal |
| the product of a matrix and its inverse | the identity matrix |
| square matrix | equal number of rows and columns |
| the product of a 2x3 matrix and a 3x4 matrix is ... | a 2x4 matrix |
| scalar | a constant multiplied with a matirx |
| dimension f a matrix | rows x columns |
| element | each value in a matrixx |
| second-order determinant | the determinant of a 2x2 matrix |
| determinant | only square matrices have a determinant |
| coefficient matrix | matrix that contains only the coefficients of a system |
| Cramer's Rule | a procedure for solving 2x2 & 3x3 systems using matrices |
| inverses | if the product of two matrices is the identity matrix, the matrices are ? |
