Divide and write the answer in the form a + bi. Let z = 2 + 2i and w = 3 - 3i. Find 
.
A. 
+ 1i
B. 
- 
i
C. 1 + 1i
D. 
+ 
i
Answer: B
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Identify the form of the argument and state whether the argument is valid or invalid.If you wear a tie, then you look natty.You do not look natty. Therefore, you are not wearing a tie.
A. Fallacy of the converse; invalid B. Fallacy of the inverse; invalid C. Disjunctive syllogism; valid D. Law of contraposition; valid
Solve the problem.The ratio of the lengths of strings that play the notes D and B is 27 to 16. If a string 64 cm long plays a B, what is the length of the string that plays a D?
A. 64 cm B. 91 cm C. 108 cm D. 80 cm
Write the improper fraction as a whole or mixed number.
A. 8
B. 8
C. 7
D. 9
Find all specified roots.Cube roots of 1.
A. 1, - 
+ 
i, - 
- 
i
B. -1, 1
C. 1, 
+ 
i, - 
+ 
i
D. 1, 
- 
i, - 
- 
i