Factor the polynomial completely using the trial and error method.15x2 - 2xy - 8y2

A. (3x + 2y)(5x - 4y)
B. (15x + 2y)(x - 4y)
C. (3x - 2y)(5x + 4y)
D. prime

Answer: A

Mathematics

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Divide and, if possible, simplify. Assume all variables represent positive real numbers.

A. 2a³z⁷
B. 2a¹⁵z³⁵
C. 2a¹⁰z³⁰
D. 2a¹⁵z³⁵

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Translate to an algebraic expression.The product of 91% and some number

A. 91x
B. 0.91 + x
C.
D. 0.91x

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Write a system of inequalities whose solution set is the region shown.

A. x ? 0, y ? 0, y ? x + 7, y ? x + 15
B. x ? 0, y ? 0, y ? - x + 7, y ? - x + 6
C. x ? 0, y ? 0, y ? - x + 7, y ? - x + 6
D. x ? 0, y ? 0, y ? - x + 7, y ? - x + 15

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Answer the question about the given function.Given the function f(x) = -5x2 - 10x + 8, what is the domain of f?

A. all real numbers B. {x|x ?-1} C. {x|x ? -1} D. {x|x ? 1}

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Mathematics