Tasha needs 75 liters of a 40% solution of alcohol. she has a 20% solution and a 50% solution available. how many liters of the 20% solution and how many liters of the 50% solution should she mix to make the 40% solution?

Tasha should mix 25 liters of 20% solution and 50 liters of 50%.

Step-by-step explanation:

Let x liters be the amount of 20% solution  and y liters be the amount of 50% solution Tasha takes.

1. Tasha needs 75 liters of a 40% solution of alcohol. Then

x + y = 75

2. There are

In total, of alcohol that is 30 l, so

0.2x + 0.5y = 30

3. Solve the system of two equations:

From the first equation:

Substitute it into the second equation

Tasha should mix 25 liters of 20% solution and 50 liters of 50%.

the central idea is that:

individuals should refuse to cooperate with institutions they believe unjust.

thoreau felt  that governments were more often agents of corruption than justice, even democracies, and that just because the majority feels a certain way does not make it just or correct in absolute terms. he uses the fact that slavery exists in our democracy to support this idea.

he goes on to say that, as a result, people should live true to their own internal laws regarding right and wrong, as a product of reflection and a moral life, rather than following every law that society imposes. 

step-by-step explanation:

step-by-step explanation:

(3rd option) - c