Crassword

2. Row reduction algorithm for solving linear equatins systems
4. A binary operation on two vectors in three-dimensional space
6. A square matrix in which every element except principial diagonal elements is zero
8. An operator which flips a matrix over its diagonal
9. A matrix that has an equal number of rows and columns
10. A matrix having all its elements in a single line
12. A single numerical value which is used when calculating the inverse or when solving systems of linear equations

1. The length of the vectors
3. The system has an infinite number of solutions.What is this system called?
5. Another matrix that,when multiplied by the given matrix,yields the multiplicative identity
7. A rectangular array of numbers(or other mathematical objects)
11. a11=4,a12=2,a21=9,a22=7.Calculate the determinant