Somebody gave me free points so I wanna give back

How to use order of operation in 20 divide by 4 multiply 5 = 1

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is