Find the value of p if the lines 3x + 4y = 5 and px - 3... – Geometry

Geometrymedium · Past Paper

Find the value of p if the lines 3x + 4y = 5 and px - 3y = 2 are perpendicular.

✓ Correct Answer: B — 4

Slopes: m1 = -3/4, m2 = p/3. m1*m2 = -1 => (-3/4)*(p/3) = -1 => -p/4 = -1 => p = 4.

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