Perform the indicated operation and, if possible, simplify.
A. 
B. 
C. - 
D. 
Answer: D
Mathematics
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Find the perimeter of the rectangle or square. 
A. 12 in. B. 15 in. C. 30 in. D. 18 in.
Mathematics
Complete the identity.sin4 x - cos4 x = ?
A. 1 - 2cos2 x B. 1 - 2sin2 x C. 1 + 2cos2 x D. 1 + 2sin2 x
Mathematics
Use the graph of the inequality to find the set.A = {x|x < -3}, B = {x|x > 3}Find A ? B.
A. {x|x > 3}; (3, ?)
B. {x|-3 < x < 3}; (-3, 3)
C. { }; ?
D. {x|x < 3}; (-?, -3)
Mathematics
Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50
Mathematics