SOLUTION: Find k if 3x+ky=1 is perpendicular to y+2x=-5

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Question 795184: Find k if 3x+ky=1 is perpendicular to y+2x=-5
Answer by lwsshak3(11628) About Me  (Show Source):
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Find k if 3x+ky=1 is perpendicular to y+2x=-5
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y+2x=-5
y=-2x-5
slope=-2
..
3x+ky=1
ky=-3x+1
y=-3x/k+1/k
slope=-3/k=1/2 (negative reciprocal of slope of first equation)
k=-6