Linear Algebra crossword

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Across
  1. 1. if 2 lines are ... their slopes are equal
  2. 4. the dimension of the nullspace of A is called ...
  3. 5. if the product of their slopes is -1, these 2 lines are ...
  4. 7. if A is an m*n matrix then the n*m matrix is called the ... of A.
  5. 10. find the determinant of the matrix: a11=2 a12=1 a21=3 a22=4
  6. 11. the process of obtaining a 1 in a location, and then making all other entries zeros in that column , is called...
  7. 13. a matrix formed by combining the columns of 2 matrices to form a new matrix
  8. 15. if we have A and B matrices and we want to find (2,3) entry of AB.We should multiply row 2 of A and ... 3 of B
  9. 17. A matrix that does not have an inverse is called
  10. 20. m=y2-y1/x2-x1 what can be found with this formula
  11. 21. a diagonal matrix A whoch all terms on the main diagonal are equal, this matrix is called a ... matrix
Down
  1. 2. a square matrix is called ... if it has all zero entries above its main diagonal
  2. 3. if the system has no solution, the system is called ...
  3. 6. if it had all zero entries below its main diagonal, a square matrix is called ...
  4. 8. compute A*B and then multiply the answer by 3 A=a11=1 a21=2 a31=3 B= a11=2 a21=3 a31=-2
  5. 9. ... has magnitude and direction
  6. 12. find x+y: x+3y=7 3x+4y=11
  7. 14. a matrix that is both upper and lower triangular is called ...
  8. 16. a11, a22, and a33are ... elements of 3*3 matrix
  9. 18. the dimension of the row or column space of a matrix A is called ...
  10. 19. solve the system and find the x: x-2y+3z=9 y+3z=5 z=2