Download Chapter 8 Review Solutions

Math 122
Chapter 8 Review Solutions
1.
2.
3. Answers vary
4. Additive Identity
5. 2x = –20, x = –10
6. From the venn diagram in number 2, any whole number is an integer, but there are integers (the
negatives) that are not whole numbers. An example would be –4
From the definition: Whole numbers = {0,1,2,3,4. . . }. Integers = {. . . ,-2, -1, 0, 1 2. . .}. So clearly
not every integer is a whole number
7.
x
x =
− x
x ≥ 0

x < 0
8.
9. Negative
10. (2 ⋅ 3) 2 ⋅ 3−1 ⋅2 = 2 2 ⋅ 2 ⋅ 32 ⋅ 3− 1= 2 3 ⋅ 3
11. 0.0000256