To turn a mixed number into a improper fraction you multiply 4 by 33 and then add 3 to that number. after this you put that over 4 and this will give you 135/4. Yes they did walk the same distance because you multiply 5/8 by 2 and it will give you 10/16
For the second half of the question, the answer is yes because you can multiply 5/8 by 2 and get 10/16 or you could divide 10/16 by 2 and get 5/8. Hope this helps!
To find the mean you first add all the numbers up you get each day 12+16+0+8+31+28+17=112 Than you divided it by how many days there are... 112/7=16 So the mean is 16
