Determine if the following equation is true or false. (a^9)^1/ a^4 = a^8 x a^1/ a^4

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 the scale factor between two circles is 2x/5y what is the ratio of their areas?

3x + 4y = 5 x- 3y = -7 solve by substitution