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

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