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Mathematics 18 Online
OpenStudy (anonymous):

The lines described by the equations y = -5/3x + 4 and y = (2/5a)x - 10 are perpendicular. Which equation could be used to determine the value of a? A. 2/5a = -5/3 B. 2/5a = 5/3 C. 2/5a = -3/5 D. 2/5a = 3/5

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