Use the formula for the sum of the first n terms of a geometric sequence to solve.Find the sum of the first 10 terms of the geometric sequence: 7, -14, 28, -56, 112, . . . .
A. -2380
B. -2387
C. -2393
D. -2389
Answer: B
Mathematics
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Express as a single logarithm and, if possible, simplify.log5 6 - log5 z
A. log10 6/z B. log5 6/z C. log5 (6 - z) D. log5 z/6
Mathematics
Factor completely.b2(b - x) - 13bx(b - x) + 42x2(b - x)
A. (b - 6x)(b - 7x)(b - x) B. (b - 6x)(b + 7x)(b - x) C. (b + 6x)(b + 7x)(b - x) D. (b + 6x)(b - 7x)(b - x)
Mathematics
What fraction is represented by the shaded portion of the figure?
Unit = one large rectangle
A. 
B. 
C. 
D. 
Mathematics
Solve the system of equations.
A. (3, 4, 9) B. (-3, 9, 6) C. (3, 9, 4) D. No solution
Mathematics