What aspects of the model pyramid may lead to inaccuracies in your estimate?

What aspects of lines have to be diffrent

Which math sentence can be used to determine if the triangle is a right triangle?

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?