\[\boxed{\mathbf{467\ (467).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[Скорость\] | \[Время\] | \[Расстояние\] | |
---|---|---|---|
\[На\ плоту\] | \[?\] | \[?\] | \[10\frac{4}{5}\ км\] |
\[На\ лодке\] | \[4\frac{1}{20}\ \frac{км}{ч}\] | \[?на\ 1\frac{5}{6}\ ч <\] | \[10\frac{4}{5}\ км\] |
Решение.
\[2)\ \frac{8^{\backslash 2}}{3} + 1\frac{5}{6} = \frac{16}{6} + \frac{11}{6} = \frac{27}{6} =\]
\[= \frac{9}{2}\ (ч) - плыл\ на\ плоту.\]
\[течения\ реки.\]
\[Ответ:2\frac{2}{5}\ \frac{км}{ч.}\]
\[\boxed{\mathbf{467}.}\]
\[1)\ 0,6x + 0,9x = 0,96\]
\[1,5x = 0,96\]
\[x = 0,96\ :1,5\]
\[x = 96\ :150\]
\[x = 0,64.\]
\[2)\ 0,9x - 0,7x + 0,85 = 1,43\]
\[0,2x = 1,43 - 0,85\]
\[0,2x = 0,58\]
\[x = 0,58\ :0,2\]
\[x = 5,8\ :2\]
\[x = 2,9.\]