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

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