Are theses sentences simple or compound sentences?

Alex's younger brother, Cameron, and two other friends also became interested in the benefit.

I think simple because it is just one independent clause.

They would charge people for a dinner and hold the auction at the dinner.

I think simple.

3 answers

the first one is simple and the second one is compound
What about the group continued planning the benefit, but not many people would buy the $25 tickets for the dinner.

Compound?
The second sentence is not compound. It has one subject and two verbs. It, too, is a simple sentence.

The sentence about the benefit is compound.