Express as a single logarithm and, if possible, simplify.logw (x2 - 4) - logw (x - 2)

A. logw 
B.
C. logw (x2 - 4)(x - 2)
D. logw (x + 2)

Answer: D

Mathematics

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Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of x2 should be positive or negative.

A. quadratic; positive B. linear; negative C. quadratic; negative D. linear; positive

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Mathematics

Solve the system. x + y + z = 1 x - y + 4z = -42x + y + z = -3

A. (1, -4, 4) B. (-4, 4, 1) C. (1, 4, -4) D. No solution

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Mathematics

Given matrix A, find the indicated cofactor.Find A42.A =

A. 0 B. -42 C. -21 D. 42

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Find the domain of the function.f(x) = 

A. {x|x ? -1}, or (-?, -1) ? (-1, ?) B. {x|x > 0}, or (0, ?) C. {x|x ? 1}, or (-?, 1) ? (1, ?) D. {x|x < 0}, or (-?, 0)

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Mathematics