44 CHAPTER 1 Review of the Real Number System
The table gives U.S. exports and imports with Spain, in millions of U.S. dollars.MIXED REVIEW EXERCISES*
*The order of exercises in this final group does not correspond to the order in which topics occur in the
chapter. This random ordering should help you prepare for the chapter test in yet another way.Source:U.S. Census Bureau.
Determine the absolute value of the difference between imports and exports for each year.
Is the balance of trade (exports minus imports) in each year positive or negative?- 2007 70. 2008 71. 2009
Perform the indicated operations.74. 75.
76. 77. 78.
79. 80. 81.
82. 83. 84.
85. 86.
87. 88.
89.Evaluate for (a) and and (b) and
90.Concept Check To evaluate , should you work within the parentheses first,
or should you square 3 and square 5 and then add?13 + 522
- m 13 k^2 + 5 m 2 k=- 4 m= 2 k=^12 m=- 43.
-
2
3
- a
1
6
-
5
9
- 2 x+ 5 - 4 x- 1 b
-
2
3
- 4.6 1 2.48 2 1 - 152 + 124 - 8 , 42
- 21 k- 12 + 3 k-k -- 100 - 13 k- 6 h 2
- 38
- 19
0.8-4.9-3.2+1.14 - 32
-
10
21
,a-5
14
- 25 b
6 # 4 - 3 # 16
- 2 # 5 + 71 - 32 - 10
- 25 a- - 8 +|- 14 |+|- 3 |
4
5
b + 33 - 32 , 4-
5
8
a- 1 - 4024
5
b4Year Exports Imports
2007 9766 10,498
2008 12,190 11,094
2009 7294 64951.Graph on a number line.Let. Simplify the elements of A as neces-
sary, and then list those elements of A which belong to the specified set.
2.Whole numbers 3.Integers
4.Rational numbers 5.Real numbersA= E- 6 , -1, -0.5, 0, 3, 25 , 7.5,^242 , - (^4) F
e-3, 0.75,
5
3
, 5, 6.3fTEST
CHAPTER 1 Step-by-step test solutions are found on the Chapter Test Prep Videos
available via the Video Resources on DVD, in , or on
(search “LialIntermediateAlg”).CHAPTERVIDEOSView the complete solutions to
all Chapter Test exercises on
the Video Resources on DVD.