What is the value 8x=5x+21

The tile along the edge of a triangular community pool needs to be replaced? ?

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?

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)