Perform the indicated operations. Write the result using a radical. Assume that all variables represent positive values.
? 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Determine whether the argument is valid or invalid.If I were your friend and you were my soulmate, then I'd never stop liking you. I've stopped liking you. Therefore, I am not your friend or you were not my soulmate.
A. Valid B. Invalid
Mathematics
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (-9, 0) and (9, 0)
vertices at (-81, 0), (81, 0)
B. center at (0, 0)
foci at (- 6
, 0) and (6
, 0)
vertices at (-9, 0), (9, 0)
C. center at (0, 0)
foci at (0, - 6
) and (0, 6
)
vertices at (0, -9), (0, 9)
D. center at (0, 0)
foci at (0, -3) and (0, 3)
vertices at (0, -9), (0, 9)
Mathematics
Find the sum Sn of the first n terms of the geometric sequence. 
, 
, 
, . . . ; n = 5
A. 
B. 
C. 
D. 227
Mathematics
Compute.|-17|
A. 17
B. 0
C. -17
D. - 
Mathematics