ANSWER
x=5
EXPLANATION
The given quadratic function has x intercepts of (0,0) and (10,0) .
The x-value of the minimum point lies on the axis of symmetry of this graph.
The axis of symmetry is the midline of the x-intercepts
[tex]x = \frac{0 + 10}{2} [/tex]
The x-value of the minimum point is
[tex]x = 5[/tex]
