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

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