Solve the problem.Find an equation for the level surface of the function 
that passes through the point (?, ?, 1) .
A. cos 
= 2?
B. 
= 2?
C. cos 
= 0
D. 
= 1
Answer: B
Mathematics
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A. -30 B. -6 C. 14 D. 20
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Subtract and, if possible, simplify.- 
- 
A. - 
B. 
C. 
D. - 
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