Perform the indicated operations and express your answer in the form a + bi. 
A. 10i
B. 10
C. -10i
D. -10
Answer: A
Mathematics
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Provide an appropriate response.Write 
as a whole or mixed number in lowest terms.
A. 25
B. 
C. 
D. 
Mathematics
Verify the identity.
= cos x + cot x
What will be an ideal response?
Mathematics
Find the center of the hyperbola.
- 
= 1
A. (0, 0) B. (0, 4) C. (6, 0) D. (6, 4)
Mathematics
Simplify. Assume that all variables represent positive real numbers.(3
+ 9)(7
- 5)
A. 18 + 78
B. 108 + 48
C. 18 + 48
D. 66
Mathematics