How did you get the answer. because i have to show my work

What are the domain and range of f(x)=[1/5]x

If 20% of a number is 35, what is 50% of that number?

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