Find an equation of an ellipse satisfying the given conditions.Vertices: (4, 7) and (4,-9); endpoints of minor axis: (-1, -1) and (9, -1)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 0
Answer: A
Mathematics
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Solve.
= -1
A. 1
B. -1
C. -
, 
D. -1, 1
Mathematics
Find the volume of the indicated region.the region in the first octant bounded by the coordinate planes and the surface 
A. 
B. 54
C. 
D. 81
Mathematics
Solve for y in terms of x.6 log 2 y - log 2 x = 2 log 2 7 + log 2 a
A. y = x + 14 + a
B. y = 
1/6
C. y = 
1/6
D. y = 
1/6
Mathematics
Use Cramer's rule to solve the system of linear equations in two variables.
A. (2, 4) B. (4, 2) C. (-4, -2) D. (-2, 4)
Mathematics