Ahyperbola centered at the origin has a vertex at (3, 0) and a focus of the hyperbola is located at (9, 0). what are the equations of the directrices?
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(x-5)1/2+5=2 what is possible solution of this equation

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000

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?