Solve 2/3 plus 5/6 and put answer in simplest form. a9/6 b 2/3 c 7/6 d 11/2

Find the value of x for which abcd must be a parallelogram -9-6x x-30

What are “like terms”? why can we only add like terms?

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?