Intermediate Algebra (11th edition)

29. 
    
    
    
    31. 
        
    
    
    
    


30. 
    
    
    
    35. 
        
    
    
    
    


31. 
    
    
    
    39. 
        
    
    
    
    


32. 
    


33. 
    


34. 
    
    
    
    47. 
        
        
        
        49. 
            
        
        
        
        
    
    
    
    


35. 
    
    
    
    53. 
        
    
    
    
    

55.intersection;

57.union;

59.union;

61.intersection; 63.{Tuition and fees}

65.{Tuition and fees, Board rates, Dormitory charges} 67.Maria, Joe
68.none of them 69.none of them 70.Luigi, Than 71.Maria, Joe

72.all of them 73. 75. 77. 79.false

Connections (page 117) The filled carton may contain between

30.4 and 33.6 oz, inclusive.

Section 2.7 (pages 118–120)

1.E; C; D; B; A 3. (a)one (b)two (c)none 5.

7. 
   
   
   
   9. 
      
      
      
      11. 
          
          
          
          13. 
              
          
          
          
          
      
      
      
      
   
   
   
   


8. 
   
   
   
   17. 
       
       
       
       19. 
           
           
           
           21. 
               
           
           
           
           
       
       
       
       
   
   
   
   


9. 
   


10. 
    


11. 
    


12. 
    


13. 
    


14. 
    


15. 
    

    (a) (b)

    
    


16. 
    
    
    
    39. 
        
    
    
    
    


17. 
    


18. 
    

    –12 048

    
    

3 - 12, 8 4

–25 0515

1 - 25, 15 2

–4 0 4

1 - 4, 4 2

–3 0 3

3 - 3, 3 4

–5 0 4 –5 0 4

9

5

-^03

A-q,-^95 D ́^3 3,q^2

–2 0 8

1 - q,- 22 ́ 1 8,q 2

–12 048

1 - q,- 122 ́ 1 8,q 2

–25 0 15

1 - q,- 254 ́ 3 15,q 2

–4 0 4

1 - q,- 44 ́ 3 4,q 2

–3 0 3

1 - q,- 32 ́ 1 3,q 2

E-^192 , 29 F 5 - 10,- 26 E-^323 , 8F 5 - 75, 175 6

5 - 5, 5 6 5 - 6, 12 6 5 - 5, 6 6 E-3,^112 F

5 - 12, 12 6

[-6,q 2 1 - 3, 2 2 - 21

01248

3 4, 12 4

02

1 - q, 0 4 ́ 3 2,q 2

0 4

1 - q, 4 2

–5 –1 0

1 - 5,- 12

1 - q, 3 2 3 3, 9 2

3 - 4,- 14 3 - 9,- 64

01

1 - q,q 2

–1 0 2

1 - q,- 12 ́ 1 2,q 2

–5 0 5

1 - q,- 52 ́ 1 5,q 2

1 - q,q 2

–2 0

3 - 2,q 2

0 8

1 - q, 8 4

081

0 4 024

1 - q, 4 (^4) 45. 47.
49.
51.
53.
55.
57.

59. 
    
    
    
    61. 
        
    
    
    
    


60. 
    
    
    
    65. 
        
        
        
        67. 
            
            
            
            69. 
                
            
            
            
            
        
        
        
        
    
    
    
    


61. 
    
    
    
    73. 
        
        
        
        75. 
            
        
        
        
        
    
    
    
    


62. 
    
    
    
    79. 
        
        
        
        81. 
            
            
            
            83. 
                
            
            
            
            
        
        
        
        
    
    
    
    


63. 
    
    
    
    87. 
        
        
        
        89. 
            
            
            
            91. 
                
                
                
                93. 
                    
                    
                    
                    95. 
                        
                    
                    
                    
                    
                
                
                
                
            
            
            
            
        
        
        
        
    
    
    
    


64. 
    
    
    
    99. 
        
        
        
        101. 
             
             
             
             103. 
                  
             
             
             
             
        
        
        
        
    
    
    
    


65. ; 107.
    108.Bank of America Center, Texaco Heritage Plaza
    109.Williams Tower, Bank of America Center, Texaco Heritage Plaza,
    Enterprise Plaza, Centerpoint Energy Plaza, Continental Center I,
    Fulbright Tower 110. (a)
    (b) (c)JPMorgan Chase Tower, Wells
    Fargo Plaza, One Shell Plaza (d)It makes sense because it includes all
    buildingsnotlisted in the answer to Exercise 109.


66. (a) 12 (b) 4 113. (a) 0 (b)

Summary Exercises on Solving Linear and Absolute

Value Equations and Inequalities (page 121)

1. 
   
   
   
   2. 
      
      
      
      3. 
         
         
         
         4. 
            
            
            
            5. 
               
               
               
               6. 
                  
               
               
               
               
            
            
            
            
         
         
         
         
      
      
      
      
   
   
   
   


2. 
   
   
   
   8. 
      
      
      
      9. 
         
         
         
         10. 
             
             
             
             11. 
                 
             
             
             
             
         
         
         
         
      
      
      
      
   
   
   
   


3. 
   
   
   
   13. 
       
       
       
       14. 
           
           
           
           15. 
               
               
               
               16. 
                   
               
               
               
               
           
           
           
           
       
       
       
       
   
   
   
   


4. 
   
   
   
   18. 
       
       
       
       19. 
           
           
           
           20. 
               
           
           
           
           
       
       
       
       
   
   
   
   


5. 
   
   
   
   22. 
       
       
       
       23. 
           
           
           
           24. 
               
           
           
           
           
       
       
       
       
   
   
   
   


6. 
   
   
   
   26. 
       
       
       
       27. 
           
       
       
       
       
   
   
   
   


7. 
   
   
   
   29. 
       
       
       
       30. 
           
           
           
           31. 
               
               
               
               32. 
                   
               
               
               
               
           
           
           
           
       
       
       
       
   
   
   
   


8. 
   
   
   
   34. 
       
       
       
       35. 
           
           
           
           36. 
               
           
           
           
           
       
       
       
       
   
   
   
   


9. 
   
   
   
   38. 
       
       
       
       39. 
           
           
           
           40. 
               
               
               
               41. 
                   
               
               
               
               
           
           
           
           
       
       
       
       
   
   
   
   


10. 
    
    
    
    43. 
        
        
        
        44. 
            
            
            
            45. 
                
                
                
                46. 
                    
                
                
                
                
            
            
            
            
        
        
        
        
    
    
    
    


11. 
    
    
    
    48. 
        
    
    
    
    

Chapter 2 Review Exercises (pages 127–131)

1. 
   
   
   
   2. 
      
      
      
      3. 
         
         
         
         4. 
            
            
            
            5. ; identity
            
            
            
            
         
         
         
         
      
      
      
      
   
   
   
   


2. ; contradiction 7. ; conditional 8.L=
   V
   HW
   0 506

E-^95 F^5166 E-^75 F^05 all real numbers^6

1 - q,- 12 ́ 1 2,q 2 3 - 3,- 24

E^13 , 9F^5 all real numbers^6 E-^109 F^5 -^260

E-^52 F^5606 C- 29 ,^152 D^1 1, 9^21 - q,q^2

E-^16 , 2F^5 -^361 - q,-^14 ́C 35 ,qB C^34 ,^158 D

(^5246) E-^15 F A-q,-^52 D C- 31 , 3D 3 1, 7 4
5 all real numbers 6 1 - q, 5 2 1 - q,- 42 ́ 1 7,q 2
1 - q,- (^242) E^38 F E 27 F 1 - 6, 8 2
1 - 5.5, 5.5 (^2) E^133 F E-^965 F 1 - q, 32 4
1 - q,q 2 526 1 - q,- 84 ́ 3 8,q 2 0 1 - q,q 2
C-^23 ,qB^5 -^165 -^36 E1,^113 F^1 - q, 5^4
5126 5 - 5, 7 (^6576) E-^25 F 0 1 - q,- 14
36
5
xÚ905.5 or x...715.5
|x-810.5|Ú 95
|x- 1000 |... 100900 ...x... 1100 810.5 ft
E- 73 F E 52 F^1 - q,q^20
E- 45 F^1 - q,q^20 E-^14 F^01 - q,q^2
1 - q, 20 4 ́ 3 30,q 2 5 - 1, 3 (^6) E-3,^53 F E- 31 ,- 151 F
1 - q,- 32 ́ 1 2,q 2 3 - 10, 0 (^4) E- 35 ,^13 F
5 3, 9 6 5 0, 20 6 5 - 5, 5 6 5 - 5,- 36
5 - 5, 1 6
–3 0 4
1 - q,- 34 ́ 3 4,q 2
C-^76 ,-^56 D

-^10304

C-^103 , 4D

–6 –1 0

5 - 6,- 16

–25 0 15

1 - q,- 252 ́ 1 15,q 2

–5 0 13

1 - q,- 52 ́ 1 13,q 2

-^9503

A-^95 , 3B

–2 048

3 - 2, 8 4

A-4 Answers to Selected Exercises

01

5

6

-^76

–1– 0