So I keep getting 8/11 for number 2 but it isn't here

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?