what is compound complex sentence?
manila is the capital city of the philippines and center of all business. 
1 Answer
A compound sentence contains two independent clauses joined by a coordinator.
and
A complex sentence has an independent clause joined by one or more dependent clauses. A complex sentence always has a subordinator such as because, since, after, although, or when or a relative pronoun such as that, who, or which.
A compound, complex sentence would have both of those.
manila is the capital city of the philippines and center of all business.
This is a simple sentence as it only has one independent clause. (a clause has both a subject and a verb). This simple sentence has a compound complement.
If you re-phrase it:
Manila is the capital city of the Philippines and it is also the center of all business it is now a compound sentence as it has two independent clauses and a coordinator.
