A hiking club charges an initial fee of $60 and then $12 for each hiking trip. Write an expression to model the total cost and then evaluate the expression for 4 hikes.

= 60 +12x

60 + 12(4) = $108

To model the total cost for the hiking club, we need to consider the initial fee of $60 and the cost of each hiking trip, which is $12.

The expression to model the total cost can be written as:
Total cost = Initial fee + (Cost per trip * Number of hikes)

Let's evaluate the expression for 4 hikes:
Total cost = $60 + ($12 * 4)
Total cost = $60 + $48
Total cost = $108

Therefore, the total cost for 4 hikes is $108.