$2.75 first hour
$1.25 additional hour
Tony wants to pay less than $8.
Then:
$8= $2.75 + $1.25x
[tex]\begin{gathered} 8\leq\text{ 2.75 + 1.25x} \\ 8\text{ - 2.75= 1.25x} \\ 5.25=\text{ 1.25x} \\ \\ \frac{5.25}{1.25}=\text{ x} \\ \\ 4.2\text{ additional hours. } \end{gathered}[/tex]Then the maximum time of additional hours that Tony can park his car at the garage if he wants to ay less than $8 is 4 hours.