Write an expression for the general or nth term, an, for the geometric sequence.-3, -6, -12, -24, . . .
A. an = -3 ? 2n
B. an = 3 ? (-2)n-1
C. an = -3 ? 2n-1
D. an = 3 ? (-2)n
Answer: C
Mathematics
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Factor the polynomial completely. If the polynomial cannot be factored, write "prime."x2 + 5xy - 14y2
A. (x - 7y)(x + y) B. (x - 7y)(x + 2y) C. (x + 7y)(x - 2y) D. prime
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A. 
B. 
C. 
D. 
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Determine the angle between u and v. Give the angle in degrees rounded to the nearest tenth of a degree.u = 9i + 5j, v = -6i + 7j
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