Let be the volume of 20% solution, the volume of the 60% solution. We want a total volume of 400 mL in the final mixture, so
Each mL of either solution will contribute a corresponding concentration, and in the final mixture we want the 400 mL to have a 40% concentration, which means we should also have
Solve the system and we get .
Domain is the x values. So based off of that...
D= {-9,-4,3,9}
The range is the y values. So based off of that...
R= {2,2,2,2}
If your teacher says not to repeat then this is your answer below...
D= {-9,-4,3,9}
R= {2}
Hope This Helps!
I think one could be (2, 11).
Answer:
you have to give the context.
Step-by-step explanation: