Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Answer: A
Mathematics
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Match the surface show below to the graph of its level curves.
A. 
B. 
C. 
D. 
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Determine whether the equation is an identity. If it is an identity, prove it.(sin x + cos x)2 = 1
What will be an ideal response?
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Multiply.(7.7)(855)
A. 6583.61 B. 6583.6 C. 6584.6 D. 6583.5
Mathematics
Simplify. Assume that variables represent positive real numbers.
A. -8x5 y6 B. not a real number C. -2x12 y6 D. -2x5 y3
Mathematics