Please help
I have a quiz due today

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?

Sarah needs 3 feet of fabric for a project she is working on, but the store only sells the fabric in meters. one meter of fabric costs $1.20. how much will the fabric cost?

What is the inverse of the function fx = 2x-10