Factor by any method.y2 - 81
A. (y2 + 9)(y2 - 9)
B. (y + 9)(y - 9)
C. (y - 9)(y - 9)
D. (y + 81)(y - 81)
Answer: B
Mathematics
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x
A. 
B. 
C. 
D. 
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Use the principle of square roots to solve the equation.x2 + 5 = 149
A. 12 B. ±11 C. 74.5 D. ±12
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Given that ? is an angle in standard position whose terminal side contains the given point, provide the exact value of the indicated function.(-7, -6) Find cot ?.
A. 
B. - 
C. - 
D. 
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