Plz help I need fast.

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

Find the value of x for which line a is parallel to line b

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?