Find the values of the variables for which the statement is true, if possible.
= 
A. a = 5; x = 5
B. a = 5; x = 7
C. a = 7; x = 5
D. a = 7; x = 7
Answer: B
Mathematics
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Simplify the expression.
-2/3
A. - 
B. 
C. 
D. not a real number
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Sketch the graph of the given equation over the interval [-2?, 2?].y = -2 cos x 
A. 
B. 
C. 
D. 
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Multiply.8 ? (-2) ? 7 ? (-4) ? 8 ? (-6) ? (-3)
A. 64,512 B. 8 C. -64,512 D. -21,501
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