50% weight of judges' scores?

Well, that's what the rules SAY. But what does this MEAN?

Exactly how are judges' scores and audience voting combined on a 50/50 basis? What is the exact numerical formula? Where are the conversion tables? Are the raw numbers published anywhere? Is there an independent agency auditing the calculations?

Amazing that people rely on the producers to be telling the truth... Goes to show, there are more suckers born every minute.