Help helppp
y is this unit so hard and confusingg

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

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Simplify the expression. -2/5(10+15m-20n)