If ST=SV=90, TU=7x, and UV=x+84, what is the value of x?

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

Afootball is throw by a quarterback to a receiver

Mama mia restaurant used 1 2 2 1 ? of their mozzarella cheese making pizza and the remaining 6 4 64 ounces making pasta. how many pounds of mozzarella cheese did mama mia start with?