The equation that represents the sequence is 15x - 37=38
The answer for x should be 12
Answer:
i think it would be b dont quote me on it
Step-by-step explanation:
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 .