The unit rate is 7 miles per day
Solution:
Given that, we have to find the unit rate
A unit rate describes how many units of the first type of quantity corresponds to one unit of the second type of quantity.
Here given that 84 miles in 12 days
Therefore, unit rate is miles covered in 1 day
This means that, 7 miles is covered in 1 day
Thus unit rate is 7 miles per day