All you need to do is add the miles from Eaton to Baxter and from Baxter to Wellington to get your answer...
42 + 37 = 79
Now we need to add the fractions
[tex] \frac{1}{2} + \frac{4}{5} = ...
[/tex]
To add we need a common denominator.
2 and 5 can both go into 10, so that will be a our common denominator.
Now you have...
[tex] \frac{5}{10} + \frac{8}{10} = \frac{14}{10}[/tex]
which is equal to [tex]1 \frac{2}{5} [/tex]
add that to the 79 we got earlier ...
The toal and final answer is [tex]80 \frac{2}{5} [/tex] miles !
Hope I helped and remember to vote this as the brainliest answer ! :)