Answer:
35/12
Step-by-step explanation:
2 1/2 is 5/2
1 1/6 is 7/6
Multiply these together to get (5*7)/(2*6) or 35/12.
Collinear points are two or more points that lie on the same line.
To get the x-intercept you put y=0
0=2x-8
2x=8 , x=4
the point is (4,0)
Simple.....

All you have to do is simplify the radical by breaking the radicand up into a product of known factors.
Thus, your answer.