Factor by grouping.x2 + 2x + 6x + 12
A. (x - 2)(x + 6)
B. (x - 2)(x - 6)
C. (x + 2)(x + 6)
D. (x + 2)(x - 6)
Answer: C
Mathematics
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Find the first term a1 and the common difference d of the arithmetic sequence.0.75, 0.7, 0.65, 0.6, 0.55, . . .
A. a1 = -0.05, d = 0.55 B. a1 = 0.75, d = -0.05 C. a1 = 0.75, d = -0.1 D. a1 = -0.05, d = 0.05
Mathematics
Insert either < or > to make a true statement.-9.0 
-1.0
A. < B. >
Mathematics
Simplify.
A. 5xy2
B. 5xy
C. 5x2
D. 125xy
Mathematics
Find the vertex.f(x) = 8x2 - 160x + 805
A. (5, 10) B. (5, 0) C. (10, 5) D. (10, 0)
Mathematics