The last choice: Running up a hill, then walking up a hill, turning around and running down the hill, then walking down the hill
I got:
c) 18x-9=72
d) 3(6x-3)=72
e) x=4.5
If you need any explanations for the answers, please tell me!
It would be 90(4 sides)= 360 ft
or 90ft+90ft+90ft+90ft=360ft
