Beginning Algebra, 11th Edition

Answers to Selected Exercises A-5

41. 
    

43. 
    

45. 
    

47. 
    

49. 
    

51. 
    

53. 
    

55. 
    

57. 
    

59. 
    

60. 
    

61. 
    

62.The graph is the set of all real numbers. 63. 65.

67. 
    

    69.83 or greater 71.all numbers greater than 16
    73.It is never less than F. 75.32 or greater 77.15 min

    
    


68. 
    
    
    
    81. ;
    
    
    82. 
        
        
        
        85. 
            
        
        
        
        
    
    
    
    


69. 
    


70. 
    


71. 
    


72. 
    


73. 
    


74. 
    


75. 
    


76. 
    


77. 
    


78. 
    

    (a) (b) 23 107. (a) (b) 22

    
    


79. 
    

    (a) (b)

    
    

Chapter 2 Review Exercises (pages 167–171)

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


2. 556 8. 5 - 46 9. 556 10. 5 - 126 11.E^645 F 12. 546

566 5 - (^126576) E 32 F 5116 5176

• 
  

  145 - (^25)

  
  


• 
  

  7 - 14

  
  

–5

24

• 5

0

C- 245 , 0D

–3 0 6

3 - 3, 6 4

–30 0

–26 6

–20 –10 10

3 - 26, 6 4

0 13

1 1, 3 2

–2 0

11

• 6
  2


• 3
  A- 116 , - 23 B

–1 0 6

3 - 1, 6 4

–3 0 4

1 - 3, 4 2

0510

1 0, 10 4

8 10

3 8, 10 4

x 7225 - 16 x 62 - 16 x... 2

R= 5 x- 100 P= 15 x- 1002 - 1125 + 4 x 2 =x- 225

• 13°

x... 20

xÚ 18 x 75

1 234567

1 - q, 4 2

12345678

1 4, q 2

12345678

546

–21 –7 0

1 - 21, q 2

01

125

C 125 , qB

0 8 32

1 - q, 32 2

0 4

3 4, q 2

01

-^12
A-^12 , qB

0

1 - q, 0 4

01

1 - q, 1 2

–5 0

3 - 5, q 2

–1 0

1 - 1, q 2 13.{all real numbers} 14. 15.{all real numbers}

16. 
    
    
    
    17. 
        
        
        
        18. 
            
            
            
            19. 20.Democrats: 70;
                Republicans: 48 21.Hawaii: 6425 ; Rhode Island: 1212
                22.Seven Falls: 300 ft; Twin Falls: 120 ft 23.80° 24.11, 13
            
            
            
            
        
        
        
        
    
    
    
    


17. 
    
    
    
    26. 
        
        
        
        27. 
            
            
            
            28. 
                
            
            
            
            
        
        
        
        
    
    
    
    


18. 
    
    
    
    30. 31.135°; 45° 32.100°; 100°
        33.2 cm 34.diameter: approximately 19.9 ft; radius: approximately
        9.95 ft; area: approximately 311 35.42.2°; 92.8° 36.
    
    
    
    


19. 
    
    
    
    38. 
        
        
        
        39. 
            
            
            
            40. 41.$3.06 42.375 km
                43.10 bronze medals 44.25.5 oz; $0.137 45. 6 46.175%
            
            
            
            
        
        
        
        
    
    
    
    


20. 2500 48.3.75 L 49.$5000 at 5%; $5000 at 6%
    50.8.2 mph 51.13 hr 52. hr


21. 
    

54.

55.

56.B 57.

58.

59.

60.

61.

62.

63.

64.

65.88 or more 66.all numbers less than or equal to 67.

68. 
    
    
    
    69. 
        
        
        
        70. 
            
            
            
            71. 
                
                
                
                72. 
                    
                    
                    
                    73. 
                        
                    
                    
                    
                    
                
                
                
                
            
            
            
            
        
        
        
        
    
    
    
    


69. 75.$304 76.4000 calories 77.Golden
    Gate Bridge: 4200 ft; Brooklyn Bridge: 1596 ft 78.100 oz; $0.060
    79.8 qt 80.faster train: 80 mph; slower train: 50 mph 81.44 m
    82.50 m or less

Chapter 2 Test (pages 171–172)

[2.1–2.3]1. 2. 3. 4. 5.

[2.4]6.wins: 100; losses: 62 7.Hawaii: 4021 ; Maui: 728 ;

Kauai: 551 8.50° [2.5]9. (a) (b) 18

10.75°, 75° [2.6]11. 12. 13.32 oz; $0.250

14.2300 mi [2.7]15.$8000 at 3%; $14,000 at 4.5% 16.4 hr

[2.8]17.

0 4

1 - q, 4 4

566 5 - 296

W=

P- 2 L

2

mi^2

mi^2 mi^2

5 - 66 5216 0 5306 5 all real numbers 6

5 all real numbers 6

r=I 1 - q, 2 2 5 - (^965706) E^134 F 0
pt

-^13576

0 1 2 5

4

3

A^43 , 5D

–2 012

(^32)
C-2,^32 D
–4 0
1 - q, - 42
–5 0
1 - q, - 52
010 4046
3 46, q 2
0 3
3 3, q 2
0 2
1 - q, 2 2
–3 0
3 - 3, q 2
–5 0 6
3 - 5, 6 2
0 7
1 - q, 7 2
–4 0
3 - 4, q 2
(^2 12)
145 43 E^72 F E- 38 F
3
ft^22
h=
2 a
b+B
h=
a
b
h= 11 a= 28 r=4.75 V=904.32
mi^2 mi^2
5206 0 5 - 16 -^72
5 - 196