which expression is equivalent to the expression shown? 3 to the power of 7 X 3 to the power of negative 4

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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?