Question

If I walked 9 miles in 2 hours how fast am I going?

Answer 1

Your speed is exactly 9 miles per 2 hours.

In units that sound more familiar, (9 miles) / (2 hours) = 4.5 miles per hour.

Answer 2

`v=(distance)/(time)=(s)/(t)\\\\s=9mi\\t=2h\\\\v=(9mi)/(2h)=\boxed{4.5\ m/h=4.5\ mph}`