A ladder is leaning against a wall. If the base of the ladder is 8ft from the wall and the ladder is 16ft long, how high up does it sit on the wall? Leave your answer in simplest radical form and do not include units.

Solve the equation by completing the square. x^2+2x=17

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?

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?