The answer is 4.77 euro.
First I found out what the cost of one pen was.
I did: 6.36/12 pens
The answer was: 0.53
Then I did 0.53 times 9
And I got the answer.
Can you please tell me how to add a picture to a question though?
Answer:
Step-by-step explanation:
First, we can divide out the common factor, 6

Now we complete the square


9 is the LCM, and the GCF is 27
(50x100):40=125
answer:125