Hi Don,
I've included two different methods to solve this problem. Both are equally valid approaches. The second way to solve is a bit faster.
First Method - We can keep a weekly list of Jill's runs. Each week, she runs 3 times. On each run, she covers 3.5km in distance.
Week 1: 3.5km + 3.5km + 3.5km = 10.5km run during Week 1.
Week 2: 3.5km + 3.5km + 3.5km = 10.5km run during Week 2
Week 3: 3.5km + 3.5km + 3.5km = 10.5km run during Week 3.
Total Ran = Week 1 + Week 2 + Week 3 = 10.5km + 10.5km + 10.5km = 31.5km
Second Method -
To see how many times Jill goes on a 3.5km run, we can multiply her 3 runs per week times the number of weeks she is running, 3 weeks. 3 runs per week * 3 weeks = 9 runs. Since each run is 3.5km long, to find the total distance Jill covers in all, we can multiply 9 runs * 3.5 km = 31.5 km.
If you have any questions about this solution or any other questions in general, please let me know!
