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

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