Solve the systems of equations by the addition method. 
A. 
B. {(7, -4)}
C. {(9, 3)}
D. no solution; ?
Answer: D
Mathematics
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Find the volume by using polar coordinates.The region under the surface 
, and bounded by the planes 
and 
and the cylinder 
A. 
B. 
C. 
D. 
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Establish the identity.
- 
= cos u - sin u
What will be an ideal response?
Mathematics
Graph the function.y = -2 csc 
A. 
B. 
C. 
D. 
Mathematics
Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.4x2 - 3x - 7 = 0
A. x = 
, -1
B. x =
, -1
C. x = 
, 1
D. x = 
, 1
Mathematics