SOLUTION: the lines described by y = (8a-8)x and y = 1/5x are perpendicular. What is the value of a ?

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Question 825365: the lines described by y = (8a-8)x and y = 1/5x are perpendicular. What is the value of a ?



Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
the lines described by y = (8a-8)x and y = 1/5x are perpendicular. What is the value of a ?
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The product of the slopes must be -1.
(8a-8)(1/5) = -1
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8a-8 = -5
8a = 3
a = 3/8
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Cheers,
Stan H.
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