Factor when possible.x2 - 4xy - 21y2

A. (x - 3y)(x + y)
B. (x + 3y)(x - 7y)
C. (x - 3y)(x + 7y)
D. Prime

Answer: B

Mathematics

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Express the given function as a composite of functions f and g such that y = f(g(x)).y =  + 5

A. f(x) = , g(x) = 5
B. f(x) = x + 5, g(x) = 
C. f(x) = , g(x) =  + 5 
D. f(x) = x, g(x) =  + 5 

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Provide an appropriate response.Find the midpoint between the points (7, -7) and (-3, -3).

A. (-4, -10) B. (-2, -5) C. (2, -5) D. (2, 5)

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Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(5x + 2)3

A. 25x2 + 20x + 4 B. 125x3 + 150x2 + 150x + 8 C. 125x3 + 150x2 + 60x + 8 D. 25x6 + 10x3 + 64

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Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.sec ? = Find cot ?.

A.
B.
C.
D.

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Mathematics