Simplify.

A. x2
B. x2
C. x4
D. x4


Answer: A

Mathematics

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Use special right triangles to evaluate the expression.cot  - sin 

A. - 
B.
C. - 
D.

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Multiply.(5 + 4i)(8 - 9i)

A. -36i2 - 13i + 40 B. 76 - 13i C. 76 + 13i D. 4 + 77i

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Provide an appropriate response.Sketch the graph of f(x) = -x2. At which of these points is the function decreasing?

A. 0 B. 2 C. -2 D. -4

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