Let the score on her seventh test be "x".
SO,

∴ He must get 104% on his seventh test to get an average score of 90%
Hello,
we must multiply the number of pages by the number of cards that hold each page to find the total number of card that she can organize, so:
5*18=90
She can organize 90 cards, but she has 95, then SHE DOESN'T HAVE ENOUGHT PAGES TO ORGANIZE THEM.
Answer:
um ight if your asking me if there are right i guess they are...
I am not sure but wouldn't it be y=3x-6 and y=4x-7