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Prove algebraically that the lines -7x+2y=-1 and -1/2x+ 1/7y=7 are parallel Prove algebraically that the lines 4x+3y=5 and 3/8x-1/2y=6 are perpendicular

Prove algebraically that the lines -7x+2y=-1 and -1/2x+ 1/7y=7 are parallel

Prove algebraically that the lines 4x+3y=5 and 3/8x-1/2y=6 are perpendicular

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