Is 130 a perfect square

You can find the constant of proportionality by finding the ratio of

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?

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with