SOLUTION: For what value of k are the graphs of 12y=-3x+8 and 6y=kx-5 perpendicular? Thanks for your help.

SOLUTION: For what value of k are the graphs of 12y=-3x+8 and 6y=kx-5 perpendicular? Thanks for your help.

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Question 912856: For what value of k are the graphs of 12y=-3x+8 and 6y=kx-5 perpendicular? Thanks for your help.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Convert to slope intercept form.
Perpendicular slopes are negative reciprocals.

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So then,

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