Matrices Crossword

1. A matrix with the same number of rows and columns
3. A matrix filled with only zeros
5. Reducing an augmented matrix so that the lefthand side is the identity matrix
7. Matrix with 3 rows and 4 columns
10. Mutliplying a matrix by its _________ will give you the identity matrix.
12. A matrix written with the coefficients and constants from a system of equations
14. Every square matrix has a value called its ________. The symbol is det or | |,
15. A numerical factor in a variable expression
16. A single entry in a matrix, can be a letter of number
18. Matrix with 4 rows and 3 columns
19. Multiple equations with the same variables

1. A number multiplied by a matrix is called _________ multiplication
2. One matrix multiplied by another is called ______ multiplication
4. Are vertical
6. Are horizontal
8. A matrix that when multiplied by another matrix returns the same matrix.
9. To add/subtract matrices they must have the same __________
11. ______ row operations include interchanging rows, adding or subtracting rows, and multiplying rows by any non-zero constant
13. A rectangular array of numbers is called a _______
17. Corresponding elements of equal matrices are ________