Question

fix any errors with subject - verb agreement below. click submit answer if there are none.
the students, along with black widow, is going to paint a mural on the wall of the cafeteria.

Explanation:

The subject of the sentence is "the students", which is a plural noun. Phrases like "along with Black Widow" do not change the number of the main subject, so the verb must agree with the plural subject, requiring "are" instead of "is".

Answer:

The students, along with Black Widow, are going to paint a mural on the wall of the cafeteria.