❗️11 points❗️
simplify the radical expression.
pleasseee

Nine more than four times a number is the same as one less than twice the number. find the number?

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?

How do you solving the solution of each system using elimination?