If h(x) is the inverse of f(x), what is the value of h(f(

Pls! does anybody know a shortcut for answering these types of questions in the future?

What is the reflection image of (5,-3) across the line y = -x?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )