The student wiped the white board that was filthy with last week notes ... which sentence is this ... Simple, complex, compound, or compound-complex

complex

Explanation:

Because it is not simple but it does not join together two ideas.

Answer: Complex

Explanation:

A simple sentence is a sentence that contains a subject and verb and expresses a complete thought. For example, I like tea

A compound sentence is a sentence that contains at least two independent clauses. These clauses are joined by a semi-colon or a conjunction [and, but, or etc.]. Every of these clauses can form a sentence by itself. For example, I dislike tea but John likes tea

A complex sentence is a sentence that contains an independent clause & a subordinate clause. While the independent clause expresses a complete thought, the subordinate clause does not. For example, I missed dinner because I was late

A compound-complex sentence is a sentence that contains at least two independent clauses & at least one subordinate clause. For example, I didn't come because I was ill so Jack was not happy