When doing inequalities, when would i know when to switch the sign/symbol (by symbols i mean; < and > )

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

What is the equation of a vertical line passing through the point (−5, −1)? y = −5 y = −1 x = −5 x = −1

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?