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?

a93 = 93 + 2(52 − 1)

a93 = 93 + 2(52 + 1)

a93 = 52 + 2(93 + 1)

a93 = 52 + 2(93 − 1)

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?

 a93 = 93 + 2(52 − 1)

 a93 = 93 + 2(52 + 1)

 a93 = 52 + 2(93 + 1)

 a93 = 52 + 2(93 − 1)

anonymous · Answer

We know that 52 is the original amount, therefore a and b should automatically be eliminated.  I'm not sure if it's c or d, I don't understand why you would have to add or subtract 1 at the end of that...Sorry!  :-/  I hope that my explanation of why it must be c or d helped, though c: