Apool pass costs $30 for the first month and $15 each additional month.
construct an explicit rule in function notation to model the arithmetic sequence.
f(n) = (simplfy your answer)

find f(12)

  [ where  represents number of months]

Step-by-step explanation:

Pool pass cost for first month =$30

Pool pass cost after first month = $15 for each month

The total amount charged by the pool can be expressed as a function where represents the number of months.

This can be simplified by using distribution.

Take 15 as greatest common factor.

∴

For months we plugin 12 for in the function.

∴ Amount charged by pool for 12 months = $195

a

b

d

step-by-step explanation:

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)