Give two examples that show how using parentheses can change the order in which operations are performed in an expression

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

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

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