Answer:
Step-by-step explanation:
As square roots has to be positive, there is no positive value for x which will satisfy the equation. As there is also a negative number outside the square root, the graph will have negative y-values for every x-value.
Answer:
n= -3
Step-by-step explanation:
16n+28= -20
16n= -48
n= -3
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 .