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

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