Answer:41 miles per day... I think
Explanation:
129/3=43 meaning in the first 3 days they biked 43 miles per day (This part isn't/wasn't necessary but it gives us an idea/range of what we are looking for lol).
293-129=164...so in the last 4 days, they biked 164 miles.
Doing the equation of 164/4 gives us the answer.
164/4=41
Therefore, they biked 41 miles a day every day for the last 4 days of vacation.
Hope this helped lol