13.9
it’s a special triangle and that side would be 8√3 which is 13.9
using the LCD method.... well, there are a couple of ways, but let's simply add them up.
well, the denominators are 5x and 2x... so the only LCD will just be 10x, since it's divisible by both, so let's use that one.

You would save $32 if you used your friends car.
I found this out by doing this:
300/15 will tell you how many gallons of gas it would take to get to Virginia Tech in your car(20 gallons). You would then multiply that by the price of gas($4), which would = $80.
300/25 will tell you how many gallons of gas it would take to get to Virginia Tech in your friends car(12 gallons). You would then multiply that by the price of gas($4), which would = $48.
So to come up with the difference you would do $80-$48, which is $32.
I hope this helped Tinytoonjr6552!