1 hiker left the trail while 1 is still on it, so theres 1 hiker on the trail.
(x+6)2+(y-10)2=36 , would be your equation.
This is the concept of algebra, to solve the question we proceed as follows;
the current number of women is:
1/4*20=5 women
the percentage of women is:
1/4*100=25%
therefore for the team to have 40% women, the number of women should be:
40/25*5
=8 women
The answer is 8 women
6^(x - 3/4) = 6^(1/2)
since 6 is the base on each side:-
x- 3/4 = 1/2
x = 1/2 + 3/4
x = 5/4 (or 1 1/4)