Answer:
[tex]5. \: 4.375 \: minutes \\ 6. \: 5 \: adults \: and \: 3 \: students[/tex]
Step-by-step explanation:
[tex]5. \: We \: have \: an \: equation:10x + 45 = 2x + 80 \: \Leftrightarrow x = 4.375 \: minutes \\ 6. \: \begin{cases} a + s = 8 \\ 7.25a + 5.5s = 52.75 \end{cases} \\\Leftrightarrow \begin{cases} a = 5 \\ s = 3\end{cases} \\ \Rightarrow 5 \: adult \: and \: 3 \: student \: tickets[/tex]
