Ответ:
\[\frac{8}{5}\left(\frac{3}{4}+\frac{11}{8}\right)=\frac{8}{5}\left(\frac{6}{8}+\frac{11}{8}\right)=\frac{8}{5}\cdot\frac{17}{8}=\frac{17}{5}.\]
Ответ: \(\frac{17}{5}\).
\[\frac{8}{5}\left(\frac{3}{4}+\frac{11}{8}\right)=\frac{8}{5}\left(\frac{6}{8}+\frac{11}{8}\right)=\frac{8}{5}\cdot\frac{17}{8}=\frac{17}{5}.\]
Ответ: \(\frac{17}{5}\).