Add.-19 + (-12) + (-5) + (-7) + 20 + (-5)
A. -68
B. 20
C. -6
D. -28
Answer: D
Mathematics
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= z for y
A. y = 
B. y = 
C. y = 
D. y = 
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A. Zero B. Positive C. Negative
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Find the exact value of the following expression without using a calculator.cos 
A. 
B. - 
C. - 
D. 
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