How many people must attend the third show so that the average attendance per show is 3000

  3500

Step-by-step explanation:

The first show attendance was 3000 -2580 = 420 short of the desired average.

The second show attendance was 3000 -2920 = 80 short of the desired average.

In order for the average to be 3000, the attendance at the third show must exceed the desired average by an amount that makes up for the shortfall:

  420 +80 = 500

Attendance at the 3rd show must be 3000 +500 = 3500.

Alternate solution

You can also attack this problem in the conventional way: use a variable (x) for the required attendance and write the equation of the average.

  (2580 +2920 +x)/3 = 3000 . . . . . . the average is the sum divided by 3

  5500 +x = 9000 . . . . . . . . . . . . . . . multiply by 3

  x = 3500 . . . . . . . . . . . . . . . . . . . . . . subtract 5500

3500 must attend the third show to bring the average up to 3000.

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:

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540