Answer: Please observe the attached image.
First image has one x-intercept, second image has 0 x-intercepts and third image of a quadratic equation has 2 x-intercepts.
Step-by-step explanation:
Given vertex at (2,0) and y-intercept (0,4).
We can see that vertex is at x-axis at x=2.
Therefore, x-intercept for first one is 1.
In second graph, we can see that parabola (graph) doesn't crossing out x-axis.
Therefore, there is no any x-intercept for second graph.
And for third one we are given a quadratic equation 
could be factored as (x-2)(x+1) =0
Applying zero product rule, we get
x-2=0 => x= 2
x+1=0 => x=-1.
Therefore, first image has one x-intercept, second image has 0 x-intercepts and third image of a quadratic equation has 2 x-intercepts.