Find the center and radius of the sphere.
A. center: (0, 0, 0); radius: 49
B. center: (0, 0, 7); radius: 49
C. center: (0, 0, -7); radius: 7
D. center: (0, 0, 7); radius: 7
E. center: (0, 0, 0); radius: 0
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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A. 
B. 
C. - 
D. - 
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Solve the joint variation.If y varies jointly with x and z, and y = 30 when x = 3 and z = 2, find y when x = 4 and z = 1.
A. 5
B. 
C. 20
D. 4
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Provide an appropriate response.While using the elimination method, if the following occurs, what can you say about the graph of the system of equations??3x - 7y = 8 - 3x + 7y = -8?0 = 0
What will be an ideal response?
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