Which equation represents a line that is perpendicular to the line whose equation is y = 4x + 12?

y = 4x + 4
y = -4x + 7
y = (-1/4x) + 1
y = (1/4x) + 9

you would use (d.) the law of cosines or a^2 = b^2 + c^2 – 2bc(cos a)

, b^2 = a^2 + c^2 – 2ac(cos b), or c^2 = a^2 + b^2 - 2ab(cos c). you wouldn't use b. the law of sines as it is mostly effective when 1side and 2angles are given. a and c aren't the answer for they are the improper versions of the law of cosines. hope this is .

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step-by-step explanation:

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