Hey if this helps anyone who reads this if that is in standard form do the opposite of A over B reduce that if you can(that gets you your slope), and then do C over B and then divided that (that gets you your Y-intercept)
This way is so much faster and so much easier than the long way
If you add all of the numerators together 3+57+13= 73 Then you would divide that number by 4 73/4= 18.25 So the course would be 18.25 or 18 1/4 miles long.