Answer:
(0,0)
Step-by-step explanation:
Orthocenter is the intersection of the three altitudes in a triangle.
https://www.wolframalpha.com/widgets/view.jsp?id=c17a1939f921b8bf84b5ddb332a9a634
Slope (m) = infinity
y=3-47.5
I did it in my notebook.
140