please help me ! I need to finish this today & I don’t understand how to do this please give me at least 3 for the simplify & justify column

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

What is the length and width of a 84.5 square foot rug? will mark