Find the unit rate:

Jim roller skates 12 miles in 2 hours.

12/2 = x/1

Cross multiply and solve for x.

To find the unit rate, divide the total distance by the total time.

The total distance is 12 miles and the total time is 2 hours.

Therefore, the unit rate is 12 miles / 2 hours = 6 miles per hour.

To find the unit rate, we need to divide the total distance by the total time.

In this case, Jim roller skated 12 miles in 2 hours.

To find the unit rate, we divide the distance (12 miles) by the time (2 hours):

Unit rate = 12 miles / 2 hours

Simplifying the division,

Unit rate = 6 miles/hour

Therefore, the unit rate is 6 miles per hour.