Harvesting from the sea Write an article for the newspaper asking people to obey the rules of harvesting from the sea.

Solve the following system of equations. \[ \left\{\begin{array}{l}x=6 y+7 \\ -x+7 y=-9\end{array}\right. \] If there is one solution, type the answer as an ordered pair, ( \( x, y \) ). If there is no solution, type \( \varnothing \). If there are infinitely many solutions, type \( \infty \).

\( \left. \begin{array} { l }{ 9 . f ( x ) = \frac { \sin ( 2 x ) } { \tan ( 3 x ) } } \\ { f ^ { \prime } ( x ) = \cos ( 2 x ) ( 2 ) } \end{array} \right. \)

el \( \operatorname{Lim}_{x \rightarrow a} f(x)=3 \) y el \( \operatorname{Lim}_{x \rightarrow a} g(x)=\frac{3}{5} \), calcule \( \operatorname{Lim}_{x \rightarrow a}[f(x)-g(x)]= \)

Dada as funções de afirmar que o valor A) 0 B) 1 C) 2 D) 3 E) 4

Solve the system with the addition method: \( \begin{array}{l}-10 x-8 y=-84 \\ x-3 y=-22\end{array} \) Answer: \( (x, y)=\square \)