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41. Simplify: (4x^2)(-2x^3)^3.
a) -64x^11
b) -64x^10
c) -64x^9
d) 64x^11
Answer: d) 64x^11

42. Solve the inequality: 3x + 4 > 2x + 5.
a) x > 1
b) x > -1
c) x < 1
d) x < -1
Answer: b) x > -1

43. Factor the expression: x^2 - 16.
a) (x - 4)(x + 4)
b) (x - 8)(x + 8)
c) (x - 2)(x + 2)
d) (x - 6)(x + 6)
Answer: a) (x - 4)(x + 4)

44. Solve the system of equations:
2x + 3y = 8
4x - 5y = -7
a) x = 2, y = 1
b) x = 1, y = 2
c) x = 3, y = 2
d) x = 2, y = -1
Answer: a) x = 2, y = 1

45. What is the slope of the line passing through the points (3, 4) and (5, 2)?
a) -1
b) 1/2
c) 2
d) -2
Answer: d) -2

46. Expand the expression: (x - 2)^2.
a) x^2 + 2
b) x^2 - 4x + 4
c) x^2 - 4
d) x^2 - 2x + 4
Answer: b) x^2 - 4x + 4

47. Solve for x: 3(x - 4) = 15 - 2x.
a) x = 5
b) x = -3
c) x = 4
d) x = 6
Answer: a) x = 5

48. Simplify: (2x^2)(3x^3)(4x^4).
a) 24x^9
b) 24x^10
c) 24x^11
d) 24x^8
Answer: b) 24x^10

49. Solve the equation: |2x - 5| = 9.
a) x = 2
b) x = 7/2
c) x = -2
d) x = -7/2
Answer: b) x = 7/2

50. Factor the expression: x^2 + 5x + 6.
a) (x + 2)(x + 3)
b) (x - 2)(x - 3)
c) (x + 2)(x - 3)
d) (x - 2)(x + 3)
Answer: a) (x + 2)(x + 3)