Math

Line L is perpendicular to the line 6x - y = 7 and passes through the point (0,6). Line M is parallel to the line y = 2/3x - 4 and passes through the point (-3, -1). Where do lines L and M intersect?

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  1. L ... point-slope ... (y - 6) = -1/6 x
    ... slope-intercept ... y = -1/6 x + 6

    M ... point-slope ... (y + 1) = 2/3 (x + 3)
    ... slope-intercept ... y = 2/3 x + 1

    substitute to find x ... 5 = 5/6 x

    substitute back to find y

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  2. I believe the best way to solve these kind of questions are to always remember m=rise/run

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