Factor.y2 - 81
A. (y + 81)(y - 81)
B. (y + 9)(y - 9)
C. (y - 9)(y - 9)
D. (y2 + 9)(y2 - 9)
Answer: B
Mathematics
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Find the sum of the series.
A. - 
B. 
C. - 
D. 
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Provide an appropriate response.What is the period of the function y = 
cos 
?
A. 120°
B. 180°
C. 
D. 3
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Add or subtract as indicated. Express the answer as a single polynomial in standard form.(4x7 + 9x6 - 6x) + (9x7 + 8x6 + 4x)
A. 13x7 + 17x6 - 2x B. 13x + 17x7 - 2x6 C. 3x7 + 12x6 + 13x D. 28x14
Mathematics
Insert < or > to write a true statement.-7 
0
A. -7 > 0 B. -7 < 0
Mathematics