Final answer:
The question is about Riley's apple picking activity and involves arithmetic and problem-solving to determine the total number of green apples she picked.
Step-by-step explanation:
The subject of this question is Mathematics, specifically arithmetic and problem-solving. The question provides information about Riley's apple picking activity, including the number of apples she picked and how she divided them into different baskets.
To find the total number of green apples Riley picked, we add the apples in the large basket (8) to the apples in the small baskets (3g).
If we assume each small basket contains the same number of green apples, we can represent the total number of green apples as 8 + 3g, where g represents the number of green apples in each small basket.