Here are some ways to use these words in a sentence, depending on what you want to express:
To show confusion:
* "The confusing instructions made everyone mingle in a state of uncertainty."
* "The sudden change of plans left everyone mingling in confusion."
To show interaction in a confusing situation:
* "Despite the chaos and confusion, the students mingled in a desperate attempt to find their friends."
* "The crowd mingled in a confusion of excitement and anticipation."
To show a mix of emotions:
* "A mixture of fear and confusion mingled in her eyes as she listened to the news."
* "Joy and confusion mingled in her heart as she received the unexpected gift."
Ultimately, the best way to use these words depends on the specific context and meaning you want to convey.