Add and, if possible, simplify.- 
x + 
x
A. 
x
B. 
x
C. - 
x
D. - 
x
Answer: C
Mathematics
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Find the center and radius of the sphere.x2 + y2 + z2 - 4x - 12y - 10z = -49
A. C(2, 6, 5), a = 16 B. C(-2, -6, -5), a = 4 C. C(-2, -6, -5), a = 16 D. C(2, 6, 5), a = 4
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Solve the quadratic equation by factoring.9y2 + 21y + 10 = 0
A. - 
, - 
B. - 
, - 
C. 
, 
D. 
, - 
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Provide an appropriate response.When writing the verbal amount on a check, the decimal position is represented by the word "dot."
A. True B. False
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Graph the function.f(x) = -x2 + 2
A. 
B. 
C. 
D. 
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