4a) The vertices of a triangle are P(-7, -4) Q(-7, -8) and R(3, -3). What are the coordinates of P' after a reflection over y=x? Please type your answer as
coordinates (x, y) with no spaces.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

With alll of except for the 2 that i did already

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?