Describe the surface with equation x2 + y2 + z2 - 6x + 2y - 12z = 75.
A) sphere with centre at (3, -1, 6) and radius 
B) sphere with centre at (-3, 1, -6) and radius 
C) sphere with centre at (3, 1, 6) and radius 11
D) sphere with centre at (3, -1, 6) and radius 11
E) sphere with centre at (3, 1, 6) and radius 
Correct Answer:
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Q2: Find the distance between the points (x,
Q3: Find the distance between the points (2,
Q4: Find the distance between (2, -1, -2)
Q5: Find the distance between (-2, 3, 1)
Q6: Find the equation of the sphere with
Q7: Describe the 3-space graph of the equation
Q8: Describe the 3-space graph of the equation
Q9: Describe the 3-space graph of the equation
Q10: Describe the set of points in 3-space
Q11: If line L passes through point (1,
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