Certain amp sub, qsc amp and mixer

[Smokey53078]

I recently got certain passive sub I went from mixer to sub amp then from that output went to qsc amp to power other subs is this correct or should I run separately from mixer

 

[rgd1101]

MERGED QUESTION
Question from Smokey53078 : "Can I go from my mixer to powered sub then from that amp to a qsc amp the sub amp has both input n output or should I go from"

Can I go from mixer the amp sub through that to an actual amp for other speakers or do I need to go separate