Number 47 Transcribed Image Text: 42. Which of the following is equal to b3 for all values of b ?

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2

A) V62

B) Vb3

C)

D)

bz

V2b² +21- a = 0

43. If a = 5 in the equation above, which of the following is a possible value of b?

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A) –2

B) -V2

C) 0

D) 3

44. Suppose that g(x) = 2x² – 5, g(k) = 45, and k > 0. What is the value of k ?

45. The function f is defined by the equation f(x) = 2* – 3x + 1. The point (4, b) lies on the

graph of f. What is the value of b?

10

46. If

what is the value of ?

3

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47. The expression (x2 + 3) – (-2x² + x – 5) can be written in the form ax² + bx + c. What is

the value of a + b +c ?

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48. What is the sum of the solutions to the equation (x – 6)(x+ 1.2)= 0 ?

LEVEL 2: PROBLEM SOLVING

49. Each bundle of wires inside a large machine needs to be secured with 5 centimeters of

electrical tape. What is the maximum number of these wire bundles that can be secured with 8

meters of electrical tape? (1 meter = 100 centimeters)

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A) 80

B) 160

C) 200

D) 320

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