Question

Will Medal!!!

Please help me understand!

Braxton loves to download new music. He originally had 41 songs but plans to purchase 4 new songs each week. He wants to know how many songs he will have after 110 weeks. Which equation should he use?

a110 = 41 + 4(110 − 1)
a110 = 41 + 4(110 + 1)
a110 = 110 + 4(41 − 1)
a110 = 110 + 4(41 + 1)

Answer 1

so he starts off with 41 songs right? and every week he purchases 4 new songs

s = number of songs
w = number of weeks

\[s = 41+4w \]

Answer 2

Right. I got that but the 110-1 and the 110+1 are throwing me off. My gut says 110-1 but I don't know why.

Answer 3

Options are wrong, I guess

Answer 4

yeah, are you sure those are your options?

Answer 5

mhm what @Photon336 said is correct but im not seeing the option

Answer 6

Positive

Answer 7

The other two don't make any sense. because remember the number of songs increases by 4 each week after. so my guess is that you would subtract 1 from it. not sure.

Answer 8

Ok. Thanks. I'll try it and see what happens. Thanks for your help.

Answer 9

yeah let me know how it goes

Answer 10

I got it right :) Thanks again for the help

Answer 11

No problem. so I guess the rationale was that 41 is the number of songs he had the first week. week one

Answer 12

Right. Which make sense they just never said that in the question so it was confusing.