620+107 compatible number to rounding

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?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Which graph shows the solution set of x^2+4-12x/> 0