Mary bought some bagels and some rolls. the bagels cost .40$ each and the rolls cost .25$. if she spent 3.90$ in all for 12 items, how many of each did she buy?

There are 6 bagels and 6 rolls.

Step-by-step explanation:

Let the number of bagels be 'b' and rolls be 'r'.

Given:

Cost of 1 bagel = $0.40

Cost of 1 roll = $0.25

Number of items = 12

Total cost of the 12 items = $3.90

Now, number of items is the sum of the bagels and rolls. So,

---------- (1)

Now, total cost of the items is the cost of 'b' bagels plus the cost of 'r' rolls.

So, total cost in equation form is:

--------- (2)

Now, multiplying equation (1) by -0.25 and adding the result to equation (2), we get:

So, number of bagels is 6.

Number of rolls,

So, there are 6 bagels and 6 rolls.

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:

cats