Can I combine Miles from two accounts to claim a reward?

No, it is not possible to combine Miles from two separate accounts.

Will Qantas offer Dubai Connect (STPC) for Emirates customers?

Will I need a separate membership number to use on Qantas-operated flights?

If I am already a Qantas Frequent Flyer, can I earn Qantas Frequent Flyer points in addition to my Skywards Miles?