Factor the difference of two squares.81x2 - 1
A. (9x - 1)2
B. (9x - 1)(9x + 1)
C. prime
D. (9x + 1)2
Answer: B
Mathematics
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Write an equation of the line.
A. y = -2x
B. y = -2x - 9
C. y = -9
D. y = - 
x - 9
Mathematics
Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x| ? 4
A. [4, ?)
B. (-?, -4) ? (4, ?)
C. [-4, 4]
D. (-?, -4] ? [4, ?)
Mathematics
Convert as indicated.60 in. to feet
A. 180 ft
B. 5 ft
C. 
ft
D. 20 ft
Mathematics
Write the sum or difference as a product containing only sines and/or cosines.sin(4?) - sin(2?)
A. sin(3?) cos ? B. sin ? cos(3?) C. 2 sin(3?) cos ? D. 2 sin ? cos(3?)
Mathematics