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Mathematics, 19.05.2020 14:13 Unstinct

Is the line through points P(7, 6) and Q(9, 11) perpendicular to the line through points R(5, 9) and S(7, 4)? Explain.

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Is the line through points P(7, 6) and Q(9, 11) perpendicular to the line through points R(5, 9) and...
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