Question

I am Almost done with my assignment could someone please help with this ?? 9th grade algebra

Answer 1

A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store.

Which recursive function best represents the number of MP3 players in the store f(n) after n months?

f(n) = 0.7 × f(n - 1) + 50, f(0) = 235, n > 0

f(n) = 237 - 0.7 × f(n - 1) + 50, f(0) = 235, n > 0

f(n) = 0.3 × f(n - 1) + 50, f(0) = 235, n > 0

f(n) = 237 + 0.7 × f(n - 1) + 50, f(0) = 235, n > 0

Answer 2

@douglaswinslowcooper Could you help me out again ?

Answer 3

i'LL TRY.

f(1) = 235 starting out in January month 1
f(2) = (0.70)(235) + 50 70% remained unsold and 50 were added
f(2) = (0.70) f(1) + 50

what will f(3) be, using tis same logic?

Answer 4

I see they want January to be n=0, so

f(0)= 235
f(1) = (0.7) f(0) + 50
f(2) = (0.7) f(1) + 50

next?

Answer 5

so since 0.7 is being multiplied to f(n) then C would be out right ?

Answer 6

Yes. Good start.

What is f(3) following my pattern?

Answer 7

(0.7) f(2) + 50

Answer 8

Wouldn't the answer come out as A since you are multiplying 0.7

Answer 9

"note" not "not"!

Answer 10

f(n) goes toward
0.3 f(n) = sold = 50 added
f(n) = 50/0.3 = 167 as n gets >> 1

Answer 11

Glad to have been helpful.

Answer 12

Thank yo very much tho !