Find the sum or difference. Write the answer in standard form.3
- (7
+ i) + 9i - (-2
+ 9i)
A. -2
- i
B. -2
+ i
C. -2 - 17i
D. 2 - 17i
Answer: A
Mathematics
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A. 
?
B. 
?
C. 
?
D. 
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Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 47
B. 
C. 
D. 412
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Multiply and simplify.
? 
A. 
B. - 
C. 
D. 
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Solve and check.a - 20 = -15
A. 5 B. -35 C. -5 D. 35
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