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Discrete Math Unit 1 and 2 Review

Author: Sturdivant Victoria
Description: match each to its correct pair.
Keywords: , , , , , , online teaching

Content:
Definitions:
0. When can I multiply matrices
1. transpose a matrix
2. whole numbers only
3. inverse of matrix A
4. natural numbers only
5. What is a row matrix?
6. when is the inverse undefined
7. integers only
8. when can I multiply a scalar by a matrix
9. ways to solve systems of equations
10. How do I solve a system by matrices
11. How do I find the resulting dimensions from matrix multiplication
12. determinant
13. irrational numbers
14. rational numbers
15. inverse of a matrix

Answers:
0. -5, 0, 4 squrt (64)
1. 0, squrt (25), 4
2. Inverse of the coefficient matrix times the constant matrix
3. use the row of the first matrix and the column of the second matrix.
4. when the row of the second matrix equals to column of the first matrix
5. squrt(2) squrt (8)
6. this is always defined, just multiply b a constant
7. when the determinant is 0.
8. ad-bc
9. A^-1
10. 5, squrt (36), 10
11. when the dimensions are 1x4
12. substitution elimination matrices graping
13. .5, -1.5, 0, 10 squrt (100)
14. (1/ad-bc) times [d -b] [-c a]
15. switch the rows and columns
.