Solve the problem.What is the coefficient of a3b4c2 in the expansion of (a + b + c)9?

A. 2520
B. 288
C. 40,320
D. 1260

Answer: D

Mathematics

Find the length of the curve.The spiral r = e3?, 0 ? ? ? ?

A. (e^3? - 1)
B. e^6? -
C. (e^6? - 1)
D. 8(?² - 1)

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Mathematics

Evaluate the expression for the given replacement values.x - 5yz for x = 89 , y = 2, z = 3

A. 79 B. 237 C. 504 D. 59

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Mathematics

Find the common difference, d, for the arithmetic sequence.-8, -12, -16, -20, . . .

A. 12 B. -4 C. -12 D. -8

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Mathematics

Simplify the radical. Assume that all variables represent positive numbers.

A. 2
B. 2
C. 2
D. 8

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Mathematics