To find the total distance Mary walked, we simply add the distances she walked in the morning and in the afternoon.
Morning walk: 24 miles
Afternoon walk: 5 miles
Total distance = 24 miles + 5 miles = 29 miles
The answer choices you provided seem to be fractions (7 1/8, 7 8/12, 8 1/8, 8 8/12). None of these options correctly represent the total distance Mary walked, which is 29 miles.
If you meant to provide different options or if there was a misunderstanding in the question, please clarify!