If the width of the painting is 68 centimeters, what is its length?

How do i do this? i don’t understand

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?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.