The Voice contented itself with vain repetitions of exclamations emitted by … concerning food. the waitresses the customers

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Другие предметы: The Voice contented itself with vain repetitions of exclamations emitted by … concerning food. the waitresses the customers

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найдем скалярное произвдеение данных векторов

{-10;5}*{3;6}=-10*3+5*6=-30+30=0

скалярное произвдеение равно 0, значит векторы перпендикулярны