Beginning Algebra, 11th Edition

[3.2]14. 15.

[3.3]16. [3.4]17. [4.1– 4.3]18.

19. 0 [4.4]20.AT&T: $14.99; jWIN: $19.99
    -^132 x-y=- 3 51 - 3, 2 26

x

y

0

3 y = 3

x

y

0

(^23)
2 x + 3y = 6
A-24 Answers to Selected Exercises
44.
x
y
0
2
4
–2
–4
y = –x^2 + 2x + 3

43. 1 1, 4 2

x

y

2

4

–2

y = x^2 – 2x + 1

1 1, 0 2

46.two; ; ; 47.one; ; ;

48.none; ; ; 49. 50.

51. 
    
    
    
    52. 
        
        
        
        53. 
            
        
        
        
        
    
    
    
    


52. 
    
    
    
    55. 
        
        
        
        56. 
            
            
            
            57. 
                
            
            
            
            
        
        
        
        
    
    
    
    


53. 
    
    
    
    59. 
        
        
        
        60. 61.400 or 800 62. ; demand: 600; price: $10
        
        
        
        
    
    
    
    

Chapter 9 Test (pages 593–594)

[9.1]1. 2. 3.

[9.2]4. 5. [9.3]6.

7. 
   
   
   
   8. [9.4]9.
   
   
   
   

[9.3]10. [9.1–9.3]11.

12. 
    
    
    
    13. 
        
        
        
        14. 15.2 sec
        
        
        
        
    
    
    
    

16.12, 16, 20 [9.4]17.- 5 + 5 i 18.- 17 - 4 i 19. 73 20. 2 - i

e^11 ^289556

4

e-^1 ^322 f

2

f

e E 1  22 F

5  213

6 f

e- 1 

27

e 2 if

3  23

E-3, 3 f

1

2 F

e E0, -^25 F

• 6  242
  2
  E^2 ^210 F f

e

• 3  226
  E 239 F 5 - 11, 5 6 4 f

1 6, 10 2

E- 1  222 F E- 2  25 F E 222 F

e E-^53 F

9  241

2

E-^1 ^23 F^0 f

e

• 5  217
  E- 2 f
  3
  2 ,
  1
  e 3 F


• 1  221
  2 f

01 - q, q 23 1, q 2 E-^112 , 5F E-^112 , 29 F

5  261 - q, q 23 - 2, q 2 5261 - q, q 21 - q, 0 4

45.

x

y

0

–2^2

y = x^2 + 4x + 2

1 - 2, - 22

[9.5]21.

x

y

036

4

9

y = x^2 – 6x + 9

1 3, 0 2 22.

x

y

y = –x^2 – 2x – 4

–3 0

–3

–7

1 - 1, - 32 23.

x

y

0

7

–3

–2

f(x) = x^2 + 6x + 7

1 - 3, - 22

24. (a)two (b) (c) and

25.200 and 200

Chapters 1–9 Cumulative Review Exercises
(pages 594–596)

[1.6]1. 15 2. 5 [1.8]3. 4.
[2.1–2.3]5. 6. 7. 8. [2.5]9. ,

10.width: 50 ft; length: 94 ft 11. or

[2.8]12.

13. 0 4

1 - q, 4 4

–2 0

1 - 2, q 2

L=P

2

L=P-^2 W -W

2

,

5186 556 E 38 F 526 100°80°

• r+ 7 19 m- 17


• 3 + 22 L-1.586

E-^3 ^22 F -^3 -^22 L-4.414

[4.5]21.

x

y

2 x + y ≤ 40

x – y > 2

2

4 [5.1, 5.2]22. or 23.

[5.4]24.

[5.5]25. 2 x^4 +x^3 - 19 x^2 + 2 x+ 20

8 x^5 - 17 x^4 - x^2

b^16

c^2

x^4

9

x^4

32 ,

[5.7]26. [5.3]27. (a) (b)0.00023

[6.1]28. [6.3]29.

[6.4]30. 31.

[6.5]32. [6.6]33.50 m [7.2]34. [7.4]35.

36. [7.5]37. [7.6]38.

[8.1]39. 10 [8.4]40. 41. [8.3]42.

[8.6]43. [8.7]44. (a) 4 (b) [9.1]45.

[9.2]46. [9.3]47.

[9.4]48. (a) 8 i (b) 49.

[9.5]50.

x

y

–1

f(x) = –x^22 – 2x + 1

e-

1

2 

217

5 + 2 i 2 if

e

2  210

2

E- 1  26 F f

e-^2 ^223

3

576 - 2 f

425

2328

4

6230

5

E-^157 , 2F

b+a

b-a

5 a+ 2

1 a- 2221 a+ 22

• k- 1
  k 1 k- 12

4

5 - 9, 6 (^65)
14 x^2 + 1212 x+ 1212 x- 12 15 m- 222
16 x^21 x- 3 y 2 12 a+ 121 a- 32
3 x^2 - 2 x+ 1 6.35* 109
vertex: ;
domain: ;
range: 1 - q, 2 4
1 - q, q 2
1 - 1, 2 2
APPENDIX A: SETS
(pages 600–601)

1. 
   
   
   
   3. 
      
      
      
      5. 
         
      
      
      
      
   
   
   
   


2. 
   
   
   
   9. 11.The sets in Exercises 9 and 10
      are infinite sets. 13.true 15.false 17.true 19.true 21.true
      23.true 25.true 27.false 29.true 31.true 33.false
      35.true 37.true 39.false 41.false 43.true 45.
   
   
   
   


3. 
   
   
   
   49. 
       
       
       
       51. 
           
           
           
           53. 
               
           
           
           
           
       
       
       
       
   
   
   
   


4. 5 a, c, d, e 6 57. 5 a, c, e, f 6 59. 0 61.Band D; Cand D

5 b, c, d, e, g, h 6 5 a, c, e 6 =B 5 d 6 =D 5 a 6

5 g, h 6

5 L 6 5 2, 4, 6, 8, 10,Á 6

5 1, 2, 3, 4, 5, 6, 7 6 5 winter, spring, summer, fall 6 0

http://www.ebook777.com

http://www.ebook777.com