Just combine like terms. So 9x would go with -7x and 4y will go with 2y. so 9x-7x equals 2x, and then 4y+2y equals 6y.So your final expression will be 2x+6y
The one that has the correct punctuation is the second option : "More and more teenagers are being diagnosed with type Ii diabetes" said Mrs. Allen, our school nurse
After quotation mark, you shouldn't use capital letter and you shouldn't use comma before the second quote
hope this helps
