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Mathematics 9 Online
OpenStudy (anonymous):

The lines 3y+1=6x+4 and 2y+1=x-9 are a)parallel b)perpendicular c)the same line d)neither parallel nor perpendicular

OpenStudy (anonymous):

should be D. first is y=2x+C second y=1/2x+C C is just a constant, they would be parallel if the the only difference would be the constant. and perpendicular if it is -1 times the other

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