For Items 9-11, determine the length of each segment with the given endpoints.
9. C(1, 4) and D(11, 28)
10. Y(-2, 6) and Z(5, -8)
11. P(-7,-7) and Q(9,5)

Anyone know? will mark brainliest if correct!

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?

Y=21.95x+10 y=22.45x solve by substitution