9=1.5z how do you solve it I need to know

Which graph represents the parent function of y=(x+2)(x-2)

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?

What is 0.000008 meters in scientific notation