Add and, if possible, simplify.
+ 
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) : x2 + y2 < 4}
A. 
The boundary is the circle of center (0, 0)
and radius 2. The set is closed.
B. 
The boundary is the circle of center (0, 0)
and radius 2. The set is open.
C. 
The boundary is the circle of center (0, 0)
and radius 4. The set is closed.
D. 
The boundary is the circle of center (0, 0)
and radius 4. The set is open.
Provide an appropriate response.Find a cofunction equivalent to sin
.
A. sin 
B. cos 
C. sin 
D. cos 
Decide if the situation is a permutation or a combination and then answer the question.A musician plans to perform 3 selections. In how many ways can she arrange the musical selections?
A. Permutation; 6 B. Permutation; 18 C. Combination; 9 D. Combination; 3
Simplify.
A. 
B. 
C. 
D. 