Ahmad and Benson spent a total of \( \$ 148 \). Which one of the following is not a possible ratio of the amount spent by Ahmad to the amount spent by Benson?

(6) \( \left\{\begin{array}{l}7 x-8=-5 y \\ y=4-3 x\end{array}\right. \)

Encuentre, en cada caso, las funciones \( \mathrm{f}+\mathrm{g}, \mathrm{f}-\mathrm{g}, \mathrm{f} \cdot \mathrm{g} \mathrm{y} \mathrm{f} / \mathrm{g} \) y estable \( \mathrm{f}(x)=x+\frac{1}{x} \) \( g(x)=\frac{x+1}{x+2} \)

\begin{tabular}{l} Rewrite the function \( f(x)=-3(x-1)^{2}+2 \) in the form \( f(x)=a x^{2}+b x- \) \\ \( f(x)=\square \) \\ \hline\end{tabular}

- \( f(x)=x^{2}+6 x+9 \)

2) Encuentre, en cada caso, las funciones \( \mathrm{f}+\mathrm{g}, \mathrm{f}-\mathrm{g}, \mathrm{f} \cdot \mathrm{g} \) y \( \mathrm{f} / \mathrm{g} \) y establezca su dominio \( \mathrm{f}(x)=x+\frac{1}{x} \) \( g(x)=\frac{x+1}{x+2} \)