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

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