Translate the statement into a mathematical equation.20 minus twice a number is 5 more than the number.
A. 20 - 2x = 5 + x
B. 20x - 2x = x - 5
C. 20 - 2x = 5 + 2x
D. 20 - 2 = 5 + x
Answer: A
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A. 
B. 
C. 
D. 
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and ? terminates in quadrant III
Find cos ?.
A. cos ? = - 
B. cos ? = - 
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it has increased to 
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