john had 21.00After buying 2 notebooks he had 13.00
21-13= 8 / 2 =4 each notebook cost 4 dollars.
it is not a function
I think you meant the two <em>segments</em><em> </em>are identical, if so then:
Answer:
I would say 42 but some of the image is cut off so I may be wrong:))
Step-by-step explanation: