Elementary linear algebra(crossword)

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Across
  1. 2. (2;1),(3;1) based on the given coordinates m-?
  2. 5. Obtained by changing its rows into columns:
  3. 7. It two systems of linear equations have the same set of solutions,then what are these equations called?
  4. 8. If the number of rows and columns in the matrix is equal,what is the matrix called?
  5. 9. a set of number arranged in rows and columns so as to form a rectangular arroy
Down
  1. 1. what is the substraction of the product of diagonals of a given matrix called?
  2. 3. what is a directed straight line segment called?
  3. 4. Let the right(head)diagonal elements be 1, and the other elements be 0, what is the matrix called?
  4. 6. what is the ratio of the change in the y-coordinate to the change in the x- coordinate called?