Explanation:
you know, when a point is defined as (10, 0), it means x = 10, y =0, right ?
so, when you think about it that way, the answer is obvious :
it is on the x-axis (with y=0 there is no leaving the x-axis).
on the positive, right side (due to x = 10 = +10).
that makes it also a part of Quadrants I and IV (the counting starts with the +/+ quadrant in the upper right and then goes counter clockwise).