\[\boxed{\text{181\ (181).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ v = s\ :t\]
\[v = \frac{600}{t}\ \frac{км}{ч}.\]
\[\textbf{б)}\ t = s\ :v\]
\[t = \frac{600}{v}\ (ч).\]
\[\boxed{\text{181.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[y = \frac{8}{x}\]
\[x\] | \[- 4\] | \[- 2\] | \[- 0,25\] | \[2\] | \[5\] | \[16\] | \[20\] |
---|---|---|---|---|---|---|---|
\[y\] | \[- 2\] | \[- 4\] | \[- 32\] | \[4\] | \[1,6\] | \[0,5\] | \[0,4\] |
\[\frac{8}{- 0,25} = - \frac{8}{\frac{1}{4}} = - \frac{8 \cdot 4}{1} = - 32\]
\[\frac{8}{5} = \frac{16}{10} = 1,6\]
\[\frac{8}{16} = \frac{1}{2} = 0,5\]
\[0,4 = \frac{8}{x}\]
\[x = \frac{8}{0,4} = 8\ :\frac{2}{5} = \frac{8 \cdot 5}{2} = \frac{40}{2} =\]
\[= 20\]