Perform the indicated operation. Simplify, if possible.
+ 
- 
A. 
B. 
C. 
D. 
Answer: A
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Sketch the indicated set. Describe the boundary of the set. Finally, state whether the set is open, closed or neither.{(x, y) : 1 < (x - 2)2 + y2 ? 3}
A. 
The boundaries are two circles, one of
radius 1 and the other of radius 3, both
centered at (2, 0). The set is neither closed or open.
B. 
The boundary is the circle of radius 3
centered at (2, 0). The interior is the
set of all points within the circle.
The set is open.
C. 
The boundary is the circle of radius 1
centered at (2, 0). The interior is the set
of all points within the circle.
The set is closed.
D. 
The boundaries are two circles, one of
radius 1 and the other of radius 3, both
centered at (2, 0). The interior is the set
of all points in between the two circles.
The set is closed.
Use a calculator to find the approximate value of the composition. Round your answer to four decimal places. The expression may be undefined.sin (cos-1 (0.8324))
A. 0.0175 B. 0.1389 C. 0.6324 D. 0.5542
Simplify.6 - 3(10 - 32) + 7
A. -4 B. 4 C. 10 D. -10
Multiply.(x + 1)(x2 - x + 1)
A. x3 + 2x2 + 2x + 1 B. x3 + 1 C. x3 - 1 D. x3 - 2x2 - 2x - 1