Free points. What is the rarest thing in the world? I mean like out of everything what is the rarest thing?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

How do i put 3(x+7) in distributive property

Afarmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. each bag of soil covers 20 square yards. how many bags should the farmer purchase? (4 points) 1 bag 2 bags 3 bags 4 bags