D (-11,-19)
I solved using elimination sorry
P.S. Answer is still correct
Are you looking for p=7.69411764
C) I think you know the increasing line is the one with 3*x and the other one is -2*x, then the dotted line requires <, instead of <=, the rest I'm sure you can figure out.
Let me know if you need more explanation, but it's to make sure next time you answer someone, instead of asking! :)
<h2>Answer:</h2>
18 liter = 14% Bleach
............ = 10% Bleach
......=


