A, the average is adding all the numbers up and dividing by the amount of numbers
Since the problem is given all the total walking distance, the first thing we are going to do is find the total distance in the map:


Now that we have the distance in the map, we can establish a ratio between the walking distance and the distance in the map:

We can conclude that each inch the map represents 0.5 miles of walking distance.
The factors are 63x thats the anser
3ab is 3ab and 7bc is 7bc they different my ni gga