DEFG is a square with vertices at D(1, 1), E(1,6), F(6, 6), and G(6, 1). DEFG is reflected in the line x = 1. Find the coordinates of D',E, F, and G'.

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Find the domain of the following expression: 1/(√x)-2

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.