Please find the nth term for all of these questions in the photo above

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

Simplify the algebraic expression 8y-2(y+4)

Write as a product of two polynomials. 2(3–b)+5(b–3)^2