Let
x--------> total number of miles Julian drove across the bridge
we know that
The length of the Seven Mile Bridge is equal to [tex]7\ miles[/tex]
The number of times Julian has crossed the bridge is [tex]34\ times[/tex]
so
To find the total number of miles that Julian drove across the bridge
Multiply the length of the bridge by the total times that Julian has crossed the bridge
[tex]x=34*7[/tex]
[tex]x=238\ miles[/tex]
therefore
the answer is
[tex]238\ miles[/tex]