A system of equations has 1 solution. If 4x - y = 5 is one of the equations, which could be the other equation?

A. y = - 4x + 5

B. y = 4x - 5

C. 2y = 8x - 10

D. - 2y = - 8x - 10

Factor the polynomial. Factor completely. 11xy^5 + 77x^2y^4

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