(2) Henry has 50 apples. He gives 4 apples each to \( f \) friends. What is the difference in the expression \( 50-4 f \) ? What does the difference represent?

\( \left. \begin{array} { l }{ y - 29 = 81 } \\ { y - 29 + \ldots = 81 + 29 } \\ { y = } \end{array} \right. \)

Example Solve the equation \( 2 x^{2}+4 x-10=0 \) with error precision 0.05

Evaluate the expression when \( a=6 \) and \( b=27 \). \[ b-4 a \] \( \square \) \begin{tabular}{ccc}\hline\( \square \) & 5 \\ \hline\end{tabular}

\begin{tabular}{l} Evaluate the expression when \( c=8 \) and \( d=4 \). \\ \( \qquad \frac{48}{c}+d \) \\ \( \square \square \) \\ \hline\( \square \) \\ \hline\end{tabular}

Utiliza logaritmos para resolver: \( 5^{x} = 125 \).