Algebra 1 Common Core Student Edition, Grade 8-9

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25. 10 girls 27. {x|x> -3} D {x|x<y}


26. {w\w< -| }u {w | w > 1} 31. {x|x < -7 }
    U {x|x> 21} 33. I/I/ U / U Z = {0, 2, 3, 4, 5, 6, 7,8}


27. W fl X fl Z = {6} 3 7 .6 2 patients 39. A fl B = A


28. {(77, 2), (77, 4), (277, 2), (277, 4), (377, 2), (377, 4),
    ( 477 , 2), (477, 4)} 4 3. {(reduce, plastic), (reuse, plastic),
    (recycle, plastic)} 45. Sometimes; when A = B = C,
    the statement is true. When A, B, and C are distinct sets
    the statement is false. 47. F 49. x = 4 or x = -4
    50. n = 2 or n = -2 51. f= 2 or f= 8 52. y = % or
    y=-1 53. -5<cf<5 54. x<
    52. y = f
    4 or x> 10
    4
    3 yes
    58. no 59. yes
    Chapter Review
    
    
    1. roster form 2. union 3. empty set 4. solution of an
       inequality 5. equivalent inequalities
    
    
    
    

pp. 222-226

H i 0 I

I '—"I h

-5 - 4 - 3 - 2 -1

H h

H h

10 12 14

3.2

• h------ie— i—
  -10 1 2 3 4

10. x> 5 11.x<-2 12. x > -5 .5 13.w>6
    -—I------ 1 ----- 1 --(D I I >
    0 2 4 6 8 10


11. V < 10 < I I I I i I CD—I f—
    4 6 8 10 12


12. —12 < f


13. n:

-— l------ 1 ------- 1 ------q>— t-----h

-18 -16 -14 -12 -10 -8

5

4

17. 8.6 <h


18. q > —2. 5
    -4 -3 -2


19. 4.25+xs 15.00; x s 10.75


20. x < 3 < i i i— i i i i (D

-1

22. y < 6


23. h> -


24. g > 4


25. n< 15

0 2 4 6 8 10

-26 -24 -22 -20 -18-16 -1 4

2 4 6

5 i i i i i t

8

11 12 13 14 15

(-13

% tla

• ---- 1 ------- 1 ------- 1 -------L«—

16

10 12 14 16 18 20

27. m> -1^67
    171
    <— I B H 1 ---- 1 ---- 1 ---1— I----1-
    -2-1012


28. 7.25/r > 200; at least 28 full hours 29. k> -0.5


29. c<-2 31. f < -6 32. y<-56 33. x<2§


30. x< -13 35. a< 5.8 36. w>0.35 37. 200 +
    0.04s > 450; s > 6250 38. { } or 0, {s}, {t}, {s, t}


31. {} or 0 , {5}, {10}, {15}, {5, 10}, {5, 15}, {10, 15}, {5, 10, 15}
    40.^ A = {0 , 2, 4, 6, 8, 10, 12, 14, 16}; A = {x|x is an
    even whole number less than 18} 41. B' = {1, 3, 5, 7}


32. —2 = } < d < 4 43. — 1. 5 < b < 0 44. f< -2
    or t > 7 45. m < -2 or m > 3 46. 2 < a < 5


33. 6.5 > p > -4 .5 48. 65 < f < 88 49. y = 3
    or y = -3 50. n = 2 or n = -6 51. r— 1 or
    r=— 5 52. no solution 5 3 .-3 < x< 3 54.no
    solution 55. x < 3 or x > 4 56. k < -7 or k > -3


34. any length between 19.6 mm and 20.4 mm, inclusive


35. A U B=A

Ch ap t er 4

Get Ready! p. 231

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0

—1-tH----I I

1 2 3 1.

h 8.6 5.

7

CTt

• 00
  10
  2.5 -*—i- —I— I— I----^1 ----1—

-7 2. -18 3. 2 4. -1

Bob's and His Dog's Ages (years)

Dog's Age 0 1 2 3 4 56789

Bob's Age 9 10 11 12 13 14 15 16 17 18

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