Factor completely.2x3 + 2x2 - 40x

A. (2x2 + 8x)(x - 5)
B. 2x(x + 4)(x - 5)
C. (x - 4)(2x2 + 10)
D. 2x(x - 4)(x + 5)

Answer: D

Mathematics

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Solve the equation. Use the change of base formula to approximate an exact answer to the nearest hundredth when appropriate.3x = 484

A. x = log 1452
B. x = log 
C. x = log3484
D. x = log3-484

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Mathematics

Determine whether the equation is linear. If it is linear, give values for a and b so that the equation can be written in the form ax + b = 0.45.4x = 4.1

A. Yes; a = -4.1, b = 45.4 B. Yes; a = 45.4, b = 4.1 C. No D. Yes; a = 45.4, b = -4.1

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Mathematics

Graph the function.y = -

A.

B.

C.

D.

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Mathematics

Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 6 feet from the source is given by the function: P(t) =  cos (2n? - ct) , where n is a positive integer. Use the difference identity for cosine to simplify P in this situation.

A. P(t) = cos (ct)
B. P(t) =  cos (ct)
C. P(t) =  cos (ct + 6)
D. P(t) =  cos (ct) -  sin (ct)

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Mathematics