This is the 9736th most frequent Spanish word.
atrasadas
"Atrasadas" means "delayed" or "late" in English.
In this sentence, 'atrasadas' refers to the state of the bills being overdue or delayed in payment.
Las facturas están atrasadas, debemos pagarlas pronto.
The bills are overdue, we need to pay them soon.
Here, 'atrasadas' applies to the people, indicating that they were delayed or late to arrive.
Las personas que venían en el autobús llegaron atrasadas al evento.
The people who came by bus arrived late to the event.
In this context, 'atrasadas' describes the tools being outdated or behind in technological advancement.