The verb “poder” is usually used with a second verb. the second verb is usually in what form?

 one verb follows another the second is expressed in the infinitive form. I always think of those as "bonus" verbs because I don't have to figure out the conjugation.

But as Robert said, haber is an auxiliary verb that works with another verb to form the compound tenses, both of which are conjugated.

p.s. i dont think this gives alot of help but it definitlys a start.

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?