To join a new fitness center, there is a $40 initiation fee. It costs an additional $10 for every spinning class you attend. What is the average cost per class if you take 10 classes in the first month of joining the fitness center? $18
$14
$10
$5

C is the right answer

$14

Solution:
Think of this as an algebraic equation, which would be expressed as 40+10s=total cost
The (s) would be the number of spinning classes you decide to take. Therefore to find the average cost of class, you would plug in 10 classes for s. This brings total cost to $140 dollars. To find the average you must divide this cost by the number of classes you took. This will be the price per each class, which is $14