Предмет: Алгебра, автор: dahbkatemir

Найдите значения выражений 1) 6 3/7 a - 8 5/8 b - 2/3 c при a = 14/15 ; b = 2 10/11 ; c= -10 1/8

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Автор ответа: Universalka

0

$\displaystyle\bf\\a=\frac{14}{15} \ \ \ ; \ \ \ b=2\frac{10}{11} \ \ \ ; \ \ \ c=-10\frac{1}{8} \\\\\\6\frac{3}{7} a-8\frac{5}{8} b-\frac{2}{3} c=6\frac{3}{7} \cdot \frac{14}{15} -8\frac{5}{8} \cdot 2\frac{10}{11} -\frac{2}{3} \cdot\Big(-10\frac{1}{8} \Big)=\\\\\\=\frac{45}{7} \cdot\frac{14}{15} -\frac{69}{8}\cdot\frac{32}{11} +\frac{2}{3} \cdot\frac{81}{8} =6-\frac{276}{11}+\frac{27}{4} =6-\frac{1104-27}{44} =\\\\\\=6-\frac{1077}{44}=6-24 \frac{21}{44} =-18\frac{21}{44}$

Автор ответа: cactus212121

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