Answer:
The cost of each pen is <u>$0.14</u> and the cost of each pencil is <u>$0.03</u>.
Step-by-step explanation:
Given:
Paulie ordered 250 pens and 250 pencils.
The pens cost 11 cents more than the pencils.
Her order costs $42.50.
Now, to find the cost of each pen and pencil.
Let the price of a pencil be 
So, the price of 250 pencils = 
And the price of a pen be 
Thus, the price of 250 pens = 
Now, to get the cost of each pen and pencil:
According to question:



<em>Subtracting both sides by 27.50 we get:</em>

<em>Dividing both sides by 500 we get:</em>

So, the price of a pencil = $0.03.
And the price of a pen = 
Therefore, the cost of each pen is $0.14 and the cost of each pencil is $0.03.