Simplify the following expression.
4a-2b

The simplified expression is:

4a-2b=2 (2a-b)

By “simplifying” an algebraic expression, we mean writing it in the most compact or efficient manner, without changing the value of the expression.

Here we are asked to simplify the expression:

   4a-2b

We know that both the terms in the expression i.e. 4a and 2b are separated by a negative sign and both have 2 as a common multiple so we will take out common 2 from both the expression i.e. we write our expression as:

4a-2b=2 (2a-b)

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

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: