Can someone me i’m really confused on how to tell if it is a predicate adjective or a predicate noun

alone =having no one else present.

at hatfield elementary school, there are 504 students in 7 classes. each class has the same number of students. what is a good estimate of the number of students in each class?

are you kidding? from that description of two mansions, you can't figure out which one is bleak and desolate? maybe you should consider looking those words up in a dictionary, if you don't know what they mean already.

so he was on top of a building and superman came through got him and put him down safely.