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course mth158

6-28

13. 10 ^2 + 24 ^ 2 = c^2 + 100 + 576 + sqart of 676 = 2616. 14^2 + 48 ^ 2 = 196 + 2304 + 2400

19. 4^2 + 5 ^ 2 = x ^2 16 + 25

36 = 41 false, not a right triangle

22. 49 + 576 = 625 and 625 = 625

hypotenuse = 25

26. lw 9 * 4 = 36

29. A = pir^2 = pi (5)^2 = 25 pi

C = 2pir c = 10pi

31. v=8 * 4 * 7 = 224 s = 21w + 21h + 2wh

s = 2 (8) (4) + 2 (8) (7) + 2 (4) (7) = 64 + 112 + 56 = 232

44. 15x ^4 - 20x ^3

46. x^2 + 3x - 2

49. 2x ^ 2 + 9x + 10

52. x^2 + 2x - 8

55. 2x^2 - x - 6

58. -3x^2 - 4x - 1

60. 2x^2 - 3x - 1

63. -6x^2 - 6y^2 - 13xy

66. x^2-1

69. x^2 + 8x + 16

70. x^2 + 10x + 25

73. 9x^2 - 16

76. 9x^2 - 24x + 16

79. 9x^2 - y^2

82. x^2 - 2xy - y^2

84. 4x^2 + 12xy + 9y^2

87. 8x^3 + 12x^2 + 6x + 1

94. (5x ^ - 2/ 6y^-2)^-3 = 125 x^5 / 36y^6

97. x^2 + y^2 = 2 + -1 = 1

102. ( squart of x ) ^ 2 = x ^ 4

105. 2 ^ -2 = 1 /2

108. 4 (2) ^ 3 + 3 (2) ^ 2 - 2 + 2 = 4 (8) + 3 (4) = 32 + 12 = 44

4 (1) ^3 + 3 (1) ^2 - 1 + 2 = 4 (1) + 3 - 1 + 2 = 4 + 4 = 8

111. (8.2)^6 + 304,006.671

114. (2.2) ^ -5 = 0.0194

117. (-8.11)^4 = 4325.97

120. 3.214 * 10

122. .00421 = 4.21 * 10 ^ -3

125. 4.23 * 10 ^ -4

Self-critique (if necessary):

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Self-critique rating:

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