It totally depends on the value of 'a', and if 'a' changes, then (6a-2) immediately changes too. Whatever 'a' is at the moment, (6a-2) is 2 less than 6 times 'a'.
Now, since we know that 5.9 is the amount of miles per day, we need to determine how many miles per month.
Usually, there are 20 days...because of no weekdays
Multiply.
5.9 * 20 = 118
Final answer:- He runs 118 miles per month.
I’m pretty sure his speed is 1 mile per hour. hope this helps you!