Answer:
The given sentence is a compound-complex sentence
Step-by-step explanation:
A compound-complex sentence is a the of sentence that must contain at least two independent clauses, and one dependent clause, separated by a comma, semi colon, or a colon.
Therefore, according to the given sentence, "He didn't raise his voice, but we knew that he meant business, and we got back work", the type of sentence is a compound-complex sentence.