Answer:
19/20 of a mile.
Step-by-step explanation:
[tex]\frac{3}{10} + \frac{1}{4} + \frac{2}{5}[/tex]
The common denominator is 20 so we times the first one by 2 the second one by 5 and the last one by 4. (Both numerator and denominator.)
You will end up with this [tex]\frac{6}{20} + \frac{5}{20} + \frac{8}{20} = \frac{19}{20}[/tex]