Answer :
[tex]v=\frac{distance}{time}=\frac{s}{t}\\\\s=9mi\\t=2h\\\\v=\frac{9mi}{2h}=\boxed{4.5\ m/h=4.5\ mph}[/tex]
Your speed is exactly 9 miles per 2 hours.
In units that sound more familiar, (9 miles) / (2 hours) = 4.5 miles per hour.
In units that sound more familiar, (9 miles) / (2 hours) = 4.5 miles per hour.
