Write the conjugate 
of the complex number z. Then find z
.z = 1 + 9i
A. 
= 1 - 9i, z
= 82
B. 
= 1 - 9i, z
= 1 - 81i2
C. 
= 1 - 9i, z
= 1 - 81i
D. 
= 1 - 9i, z
= -80
Answer: A
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A. f.e.r. = 0.31, b.e.r. = 0.48; No B. f.e.r. = 1.06, b.e.r. = 1.23; Yes C. f.e.r. = 0.21, b.e.r. = 0.38; Yes D. f.e.r. = 0.26, b.e.r. = 0.43; No
Combine. Assume that all variables represent non-negative real numbers.7 
+ 4xy 
A. 11x2y4
B. 15 xy3
C. 15x2y3
D. 11xy4
Match the equation with its graph.y = x(x - 3)
A. 
B. 
C. 
D. 
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A. km(5k - 2m)(5k + 2m) B. km(5k + 2m)2 C. km(5k - 2m)2 D. Prime