Help meh on this and please explain ... im marking brainliest

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

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Which inequality has a dashed boundary line when graphed ?