Final answer:
Jillian's trip has 3 legs. Her average speed can be calculated by dividing the total distance traveled by the total time taken.
Step-by-step explanation:
Jillian's trip has a total of 3 legs. (A) The first leg is when she travels 10 km east for 10 min. (B)
The second leg is when she stops at a store for 15 min. (C) The third leg is when she travels 15 km west for 22 min. (D)
To calculate Jillian's average speed for her entire trip, we need to find the total distance traveled and the total time taken. The total distance traveled is 10 km + 15 km = 25 km.
The total time taken is 10 min + 15 min + 22 min = 47 min. Average speed = total distance / total time = 25 km / 47 min