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

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