Factor the polynomial completely. If the polynomial cannot be factored, write "prime."3x3 - 39x2 + 108x
A. 3x(x + 4)(x + 9)
B. 3x(x - 4)(x - 9)
C. x(3x + 4)(x + 9)
D. x(x + 4)(3x + 27)
Answer: B
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Factor by grouping.r2 + 8r + 5r + 40
A. r(r + 53) B. (r + 8)(r - 5) C. (r - 8)(r - 5) D. (r + 8)(r + 5)
Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 
A. 1 + 
B. -1 - 
C. -1 + 
D. 1 - 
The graph below is one complete cycle of the graph of an equation containing a trigonometric function. Find an equation to match the graph. If you are using a graphing calculator, graph your equation to verify that it is correct.
?
What will be an ideal response?
Find the first term and the common ratio for the geometric sequence. Round approximations to the nearest hundredth.a2 = 20.8, a9 = 130.52
A. a1 = 130.52, r = 0.77 B. a1 = 20.8, r = 1.3 C. a1 = 16, r = 0.77 D. a1 = 16, r = 1.3