Answer:
Se lavan
Step-by-step explanation:
The reflexive verbs in spanish has two main components, the indicative which would be "se" and the verb conjugated depending on who is performing the action, remember that in spanish you use a different form of the verb depending on each person, first, second and third, in singular and plural, in this case it is using "Ustedes" or the You in plural "Y´all" that means we will use the verb "Lavan".