The three lines represent the price, in dollars, of three different brands of chocolate bars.
Which brand of chocolate bar is the most expensive?

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?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Interpret the following expression (5y^2-7)^3/(2y)^2