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

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