Answer:

Explanation:
Ava purchased a set of 35 stamps. Each month, starting the second month, she purchased 3 more stamps for her collection.
So first month she has 35 stamps, second months she has 38 stamps and so on...
35, 38, 41, 44........
This is arithmetic sequence , so we use formula

Where a1 is the first term and d is the difference
a1= 35, d= 3
so formula becomes


