Question

I NEED THIS QUICK! Daniella has 130 baseball cards. She buys 10 new cards to add to her collection every month. Which arithmetic sequence describes the number of cards in her collection?

A. a1=10;an=an−1+130
B. a1=10;an=an+1+130
C. a1=130;an=an−1+10
D. a1=130;an=an+1+10

Answer 1

Explanation:

The answer is the third one.

She starts with 130

a1 = 130

She adds 10 every month.

So you take the number she had last month (represented by a_n-1) and adds 10.

Answer

a1 = 130

an = an_1 + 10

C