HELP The ratio relationship of water to cement in a concrete mixture is shown on the graph below.
00
7
water (y)
3
2
1
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17 18 19
Cement (x)

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?

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Which angle of rotation is an angle of rotational symmetry for all figures?