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

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