You wouldn't be able to dual axis or create a combined axis to give you the view you want. As one chart has two dimensions and the other has one, Tableau cannot sync them together.
What you can do is add the Resolution Time measure into detail on the marks card in the first bar chart.
Then go to reference lines and select Resolution Time to be calculated per pane.
I have attached an example workbook for you to review.
Reference Lines_v10.2.twbx 7.3 MB