Use gcf and the distributive property to write equivalent expressions in factored form for 4d+12e

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 lcm of 16 and 40 ? 24 and 40 ?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.