Write the conjugate 
of the complex number z. Then find z
.z = 
- 
i
A. 
= 
+ 
i, z
= 
B. 
= 
+ 
i, z
= 0
C. 
= 
+ 
i, z
= 
D. 
= 
+ 
i, z
= 
Answer: D
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Translate the equation into a sentence by using the phrase "varies directly" or "varies inversely". x = k
A. x varies inversely as the square root of t. B. x varies directly as the square of t. C. t varies directly as the square root of x. D. x varies directly as the square root of t.
Evaluate the expression.P(9, 9)
A. 362,880 B. 9 C. 181,440 D. 1
Solve the equation.
= 
A. 
, 0
B. No solution
C. - 
, 0
D. - 
, 
The graphs show the sales of two companies competing for market share. Use the graphs to answer the question.
If x represents Company B's sales in 1992 and y represents Company A's sales in the same year, then the relationship between x and y is
A. x > y B. x = y C. x < y D. x ? y