Answer:
Option A. 
Step-by-step explanation:
we know that
The measure of the median is the semi-sum of the bases
so

He still has half way more to go because 3/8+1/8=4/8 or 1/2. So he has 1/2 of the way left to walk.
Y = 18 - x
3x - 18 + x = -12
4x = 30
X = 30/4
= 7 1/2
Answer:
The intersection point is 
Step-by-step explanation:
we have
------> equation A
------> equation B
we know that
The intersection point both graphs represent the solution of the system of equations
Using a graphing tool
The intersection point is 
see the attached figure