If the points (2, 2-2x),  (1, 2) and (2, b - 2x) are collinear, the value of b is -

Find the value of P for which the points A(-1, 3), B(2, P) and C(5, -1) are collinear :

If the points $(1,0), (0,1)$ and $(x,8)$ are collinear, then the value of $x$ is equal to

$A,B,C$ are three collinear points. The coordinates of $A$ and $B$ are $(3,4)$ and $(7,7)$ respectively and $AC=10$ units. Find the co-ordinates of $C$.