Factor completely. If unfactorable, indicate that the polynomial is prime.81x2 - 126xy + 49y2
A. (9x + 7y)2
B. (81x + 1)(x + 49)
C. (9x - 7y)(9x + 7y)
D. (9x - 7y)2
Answer: D
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Solve the problem.A rotating beacon is located a distance d from a long wall. The distance d is given by 
, where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 2? arctan 
B. t = 
tan 
C. t = 
arctan 
D. t = 2? tan 
Graph the equation by completing the table of values.y = 2x2 + 1
A. 
B. 
C. 
D. 
Determine whether or not the number is written in scientific notation.0.0005
A. Yes B. No
Write two equivalent expressions, one with parentheses and one without, for the opposite of the polynomial.-6a3 + 2a2 + 2a - 3
A. - (6a3 - 2a2 - 2a - 3), -6a3 - 2a2 - 2a - 3 B. - (6a3 - 2a2 - 2a - 3), -6a3 + 2a2 + 2a + 3 C. - (-6a3 + 2a2 + 2a - 3), 6a3 - 2a2 - 2a + 3 D. - (-6a3 - 2a2 - 2a - 3), 6a3 + 2a2 + 2a - 3