Question

Samantha loves to download new music. She originally had 52 songs but plans to purchase 2 new songs each week. She wants to know how many songs she will have after 93 weeks. Which equation should she use?

Answer 1

Explanation:

a93 = 93 + 2(52 − 1)

a93 = 93 + 2(52 + 1)

a93 = 52 + 2(93 + 1)

a93 = 52 + 2(93 − 1)

Originally 52 - Get rid of the first 2

a93 = 52 + 2(93 + 1)

a93 = 52 + 2(93 − 1)

2 each week. - Annoying. That doesn't help.

a93 = 52 + 2(93 + 1)

a93 = 52 + 2(93 − 1)

We're not buying any new ones in the first week, so purchases are one down.

a93 = 52 + 2(93 − 1)

I think we made it.