Algebra+1+archived+even+answers

toc =Even answers= =p. 8= 12. 70, 64, 58 14. 65, 86, 111 17. second differences are 5 36. 8.37 38. 1/3 42. 1

=p. 15= 1. variable: x expression: 5x – 7 equation: 3x + 1 = 6 6. Table values: 9.50, 12, 14.50, 17; Equation: c = 2.5h + 7 20. 12, 21, 30, 39, 48

=p. 21= 52. 18 64. 30

=p. 27= 34. III (–6, –9) 40. II (–4, 1)

=p. 34= 14. First difference is –10; y = 250 – 10x 36. 6 tickets 38. $6.40 44. 4 46. 4

=p. 40= 4. a) Little to none, since the points are not close to a line of best fit; b) Strong positive since the points are close to a line that is going up from left to right. 6.Strong positive 8. Little to none.

=p. 58= 24. < 26. > 44. Example answers: a) 7 b) –7 c) 0

=p. 65= 20. –3 26. 66 32. 0 38. –3.28 44. 2.53 50. –11/20

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=p. 58= 30. 0 32. –x 52. 3 56. –6 =p. 65= 56. –1 58. –5 64. 0

=p. 71= 16. 5 20. -17 24. -199 28. 64 32. 66 36. –58 40. –32.45 44. –3/5 48. 8 50. 5 52. 7 54. 7 56. 5 58. 24 64. a. 1 hour 55 minutes b. 1 hour 53 minutes

=p. 78= 60. False 62. True 66. a. 15 b. 30

=p. 86= 24. 9, 9 5400, 720 6120 32. Commutative 34. Distributive 36. Commutative

=p. 92= 8. 10x – 4 10. 2f – 2g 50. –m + 12r

=p. 101= 10. –7b +13c – 4 12. 2x^2 + 5 50. a, b 54. 6x^2

=p. 119= 22. m = –18 28. z = 140 34. y = 1/9 40. j = –5.6 46. m = 5 52. x = –11.5 58. h = –14.4

=p. 127= 20. x = 8 38. b = -15/4 44. x = 9/8 50. w = -13/2

=p. 133= 16. c = 22 34. f = 25 46. h = –144

=p. 133= 42. x = –195

=p. 139= 14. x = –4 16. x = 7 18. x = –3 20. z = 2 22. x = – 3 24. x = 1 26. h = 3 28. x = –7/5 30. w = 12 32. x = -1/78

=p. 145= 8. Every number works!!! So, answer is: All real numbers 14. x = –8

=p. 145= 32. No solution. 38. x = –11 44. x = 15; perimeter = 90

=p. 151= 8. A = I + P 10. m = y/x 12. b = 5

=p. 168= 14. Not true. 20. True. 26. 40 32. 785 38. 2.7 44. 48

=p. 176= 54. 12.5% 86. –3f 2 –7

=p. 183= 20. 0.42

=p. 190= 50. 17; 18; 17

=p. 231= 12. –1/3 16. 1/2 26. 9/5 34. undefined 38. 0

=p. 249= 34. y = 2/3 x 36. y = -3/2x + 4

=p. 256= 20. 2x – 4y = 0 40. y = 5

=p. 256= 44. y = 0x + 4; 0x +1y = 4 46. y = 4x + 0; 4x -1y = 0

=p. 223= 6. D: {1, 2, 3, 4} and R: {1} and Function 8. (3, 9) 10. (21/4, 0) 16. D: {2} and R: {1, 1000} and Not a function 18. (8, 2) 26. (10, 6)

=p. 262= 24. 4 28. 3 34. –2/5 48. y = 7 52. y = 3x – 4 56. y = 5x + something 58. 0 60. Undefined

=p. 240= 1. At first, uphill, then downhill, then on level ground 6. $10 per hour 8. k = 1/4 and y =1/4x 10. k = 32 32. 3 miles per hour 34. 5 hours

=p. 280= 6. b ≤ –12 8. m ≥ 6 10. x ≥ 7 12. x ≥ 20 14. x < 4 32. m < –10 36. x ≥ –1 38. x > –2 44. t ≤ 54 46. t = 78

=p. 293= 12. –2 ≤ x ≤ 4 16. x > 7/2 or x < 7/3 20. Graph with open circles at 2 and 4 and arrows going both left and right (gap between 2 and 4) 34. –4 < x ≤ 9 36. x < –8 or x ≥ –6 44. –1 – 5y

=p. 305= 6. x = 7 or x = –3 8. x = 3.4 or x = 2.4 12. 2.4 ≤ x ≤ 3.4 26. x = 2 or x = –22/7 28. 6 < x < 18

=p. 329= 22. (18, –5) 24. (8, –3) 40. 30

=p. 329= 10. (7, –9) 12. (–14,19) 14. (1, 3) 16. (1/3, 1/3) 20. (4, 2)

=p. 323= 4. (1, 3) 12. (0, 0) 28. No 30. Yes

=p. 358= 14. Carol is 50, Anjie is 16

=p. 342= 14. no solution; inconsistent 20. (0, 4); consistent & independent

=p. 335= 14. (–4, 4) 38. (–2, –4)

=p. 358= 12. 26

=p. 335= 16. (–4, 4) 32. (4, 8) =p. 358= 6. 2/3 mph 8. 8 quarters

=p. 476= 10. a 12. c 14. c 18. t ≤ –5 22. 2.5 x 10 -6 26. 4xy 2 28. x 10 y 28

=p. 430= 12. 10x 4 + 3x 3 – x 2 –11 14. 14x 20. 5x 4 + 5x 3 + 5x 2 –1 50. 16x + 12 52. 6x + 2 60. 7.1 x 10 6

=p. 441= 32. x 3 + x 2 y + xy + y 2 50. x 12 /y 6 52. y 20 /x 12

=p. 450 = 6. 5b(2c + 1) 8. 4xy(x + 3y – 5) 16. 5(m 2 – 7) 18. 4f(f + 1) 22. x 2 (x 7 – 1) 24. 4a 4 (a 4 – 5a 2 + 2) 28. 4n(n 2 – 4n + 2) 30. 2p 2 r(p 2 – 4pr + 8r 2 ) 34. 4x 2 (x 2 – 6) 36. 14r(3 – r 2 ) 40. x n (x 3 + 1) 42. x 2n+14 (x n+7 + 2) 46. (4 + p)(3q – 4) 48. (x – 4)(r + t) <span class="wiki_link_ext">52. (y – 1)(8 – x) <span class="wiki_link_ext">54. (m + 7)(3 – n)
 * <span class="wiki_link_ext">*I am including answers for both column 1 and column 3. **