Perform the indicated operation. Simplify if possible.
- 
A. 0
B. 4b
C. 2b
D. 4a
Answer: C
Mathematics
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Sketch a typical level surface for the function.f(x, y, z) = 
A. 
B. 
C. 
D. 
Mathematics
If possible, simplify the expression. If any variables exist, assume that they are positive.5
+ 
A. 6
B. 5
+ 
C. 15
D. 8
Mathematics
Name the quadrant in which the angle ? lies.sin ? > 0, cos ? < 0
A. I B. II C. III D. IV
Mathematics
Use the given information to find the exact value of the expression.sin ? = 
, ? lies in quadrant II, and cos ? = 
, ? lies in quadrant I
Find cos (? - ?).
A. 
B. 
C. 
D. 
Mathematics