College Algebra Placement

(Complex Numbers)
1. For i = the square root of -1, if 3i (2 + 5i) = x + 6i, then x = ?
A.  –15
B.  5
C.  5i
D.  15i
E.  27i
 
(Functions)
2. If f(4) = 0 and f(6) = 6, which of the following could represent f(x) ?
A.  2/3x – 4
B.  x + 2
C.  x – 4
D.  3/2x + 6
E.  3x – 12
 

Answers:

1. A
2. E


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