Beginning Algebra, 11th Edition

80 CHAPTER 1 The Real Number System

Tell whether each statement is trueor false.

17. 
    
    
    
    18. 
        
        
        
        19. 
            
        
        
        
        
    
    
    
    

Write each word statement in symbols.

20.Thirteen is less than seventeen. 21.Five plus two is not equal to ten.

22.Two-thirds is greater than or equal to four-sixths.

1.3 Evaluate each expression for and

23. 24. 25. 26.

Write each word phrase as an algebraic expression, using x as the variable.

27.Six added to a number 28.A number subtracted from eight

29.Nine subtracted from six times a number 30.Three-fifths of a number added to 12

Decide whether the given number is a solution of the given equation.

31. 2 32. 6

Write each word statement as an equation. Use x as the variable. Then find the solution from

the set

33.Six less than twice a number is 10. 34.The product of a number and 4 is 8.

1.4 Graph each group of numbers on a number line.

35. 36.

Classify each number, using the setsnatural numbers, whole numbers, integers, rational

numbers, irrational numbers,andreal numbers.

37. 
    
    
    
    38. 
        
        
        
        39. 19 40.
        
        
        
        
    
    
    
    

Select the lesser number in each pair.

41. 
    
    
    
    42. 
        
        
        
        43. 
            
            
            
            44. 
                
            
            
            
            
        
        
        
        
    
    
    
    

Decide whether each statement is trueor false.

45. 
    
    
    
    46. 
        
        
        
        47. 
            
            
            
            48. 
                
            
            
            
            
        
        
        
        
    
    
    
    

For each number, (a)find the opposite of the number and (b)find the absolute value of the

number.

49. 
    
    
    
    50. 0 51. 6 52.
    
    
    
    

Simplify.

53. 
    
    
    
    54. 
        
        
        
        55. 
            
            
            
            56. 
                
            
            
            
            
        
        
        
        
    
    
    
    

1.5 Perform each indicated operation.

57. 58. 59.

60. 61.-13.5+ 1 - 8.3 2 62. 1 - 10 + 72 + 1 - 112

4

9

+a-

5

4

b

- 10 + 4 14 + 1 - 182 - 8 + 1 - 92

|- 12 | -| 3 | -|- 19 | -| 9 - 2 |

-

5

7

- 9

12 7- 13 0 7- 5 - 9 6- 7 - 13 Ú- 13

- 0, -| 23 |

2

3

, -

3

4

- 10, 5 -8, - 9

0.63  6

4

3

- 4, - -2, |- 3 |, -3, |- 1 |

1

2

, 0, 2.5, 5

5 0, 2, 4, 6, 8, 106.

t+ 5

3 t

5 x+ 31 x+ 22 =22; =1;

x^2 + 3

3 y-x

x

3

2 x+ 6 y 413 x-y 2 + 4 y

x= 6 y=3.

12 # 3 - 6 # 6 ... 0 335122 - 34720 9 ... 42 - 8

63. 3 - 6 + 1 - 82 + 84 + 39 + 1 - 1324 64. 1 - 4 + 72 + 1 - 11 + 32 + 1 - 15 + 12

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