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

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