Simplify the expression using the imaginary unit i.
A. -18i
B. 18i
C. -i
D. ±18
Answer: B
Mathematics
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Write the function in the form 
or 
. Find the period and phase shift.y = - 
sin
A. y = - 
sin
period = - 
; phase shift = 
B. y = - 
sin
period = 6; phase shift = - 1
C. y = - 
sin
period = 6; phase shift = - 
D. y = - 
sin
period = 3; phase shift = 1
Mathematics
Find f(x) and g(x) such that h(x) = (f ? g)(x).h(x) = 
A. f(x) = 
, g(x) = 
B. f(x) = 
, g(x) = 
C. f(x) = 
, g(x) = 
D. f(x) = 
, g(x) = 
Mathematics
Fill in the missing factor.6x2 - 47x - 63 = ( )(x - 9)
A. 6x + 7 B. x + 6 C. x - 7 D. 7x + 6
Mathematics
Find the vertex and focus of the parabola below.
a. Vertex: 
Focus: 
b. Vertex: 
Focus: 
c. Vertex: 
Focus: 
d. Vertex: 
Focus: 
e. Vertex: 
Focus: 
Mathematics