Have u tried 3x-3y
I don't know the other one sorry
3 dozen = 36 cookies
20/12 = 1.666666666666667
1.666666666666667 = 1 cookie
(x36)
36 x 1.666666666666667 = 60
It will cost him $60 for 3 dozen cookies
I wrote my answer in the picture
Hello
The place value is 9 hundred thousand or 900,000
Hope this helps
Plz mark me as Brainliest