Question

a website subscription costs $15 monthly plus a one - time setup fee of $20. write the equation for the total cost c for n (in) months.
a. c = 35n
b. c = 15n + 20
c. c = 20 - 15n
d. c = 20n + 15

Explanation:

Step1: Identify fixed and variable costs

Fixed cost = $20 (one-time setup), variable cost = $15/month × \( m \) months.

Step2: Form total cost equation

Total cost \( C = \text{variable cost} + \text{fixed cost} = 15m + 20 \).

Answer:

b. \( C = 15m + 20 \)