Find the product of the complex number and its conjugate.3 + i
A. 45
B. 3
C. 15
D. -27
Answer: C
Mathematics
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Sketch the circle.9(x + 2)2 + 9(y - 5)2 = 64
A. 
B. 
C. 
D. 
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 
+ 
A. 8
B. 56
C. 8
D. -4
Mathematics
Find the exact value under the given conditions.cos ? = 
, 0 < ? < 
; sin ? = - 
, - 
< ? < 0Find tan(? + ?).
A. 
B. 
C. 
D. 
Mathematics
Use the given vectors to find the indicated expression.v = -5i + 3j + 3k, u = -2i + 3j + 5kFind v × (-4u).
A. -24i - 76j + 36k B. 24i + 76j - 36k C. -96i - 128j - 32k D. 6i + 9j - 9k
Mathematics