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Mathematics 6 Online
OpenStudy (anonymous):

determine whether 4x + 18 = 9 and 9x -2-6 are parallel, perpendicular, or neither

OpenStudy (midhun.madhu1987):

Find their slopes. If the slopes are equal, then they are parallel If the product of their slopes is -1, then the lines are perpendicular

OpenStudy (anonymous):

How do you calculate their slopes?

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