Simplify.(-2x3y)(-4x6y4)

A. -6x9y4
B. -8x9y4
C. 8x18y4
D. 8x9y5

Answer: D

Mathematics

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Find the first term and the common ratio of the geometric sequence.3, -6, 12, -24, 48, . . .

A. a1 = -2, r = 2
B. a1 = 3, r = - 
C. a1 = 3, r = -2
D. a1 = -2, r = 6

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Mathematics

Solve the problem.The sales of a new product (in items per month) can be approximated by , where t represents the number of months after the item first becomes available. Find the number of items sold per month 33 months after the item first becomes available.

A. 90,000 items per month B. 3300 items per month C. 6300 items per month D. 900 items per month

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Mathematics

Divide, if possible.

A. -16
B. 6
C. -  
D. -6

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Mathematics

Find the slopes of the lines that are (a) parallel to and (b) perpendicular to the line passing through the pair of points.(-1, -1) and (4, 4)

A. (a) 0; (b) 0
B. (a) -1; (b) 1
C. (a) 1; (b) -1
D. (a) - ; (b) 4

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Mathematics