Find all numbers u (if any) so that the given point (u, y) or (x, u) is on the unit circle.
A. ± 
B. ± 
C. None
D. ± 
Answer: C
Mathematics
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.
3
A. 
B. 
C. 
D. 
Mathematics
Add or subtract as indicated. Write the answer in simplest form.
+ 
A. 
B. 
C. 
D. 
Mathematics
Find z1z2. Express the answer in standard form.z1 = 4(cos 30° + i sin 30°)z2 = 5
A. -10 - 10i
B. 10
- 10i
C. 10 + 10i
D. -10
+ 10i
Mathematics
Solve the problem.A basket contains 6 oranges and 4 tangerines. A sample of 3 is drawn. Find the probability that they are all oranges.
A. 
B. 
C. 
D. 
Mathematics