Simplify, where possible.3(x + 2 + 2y)
A. 3x + 2 + 2y
B. x + 6 + 6y
C. 3x + 6 + 6y
D. 3x + 6 + 2y
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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Find the surface area of the cylinder exactly, suppose, that d=11 m, h=9.8 m.
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Mathematics