Given that 2x – 2y = 23 Find & when y = 9
Give your answer as an improper fraction in its simplest form.​

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 factored form of the following expressions? d^2 – 13d + 36

Which best explains why this triangle is or is not a right triangle ?