X=120
This is the answer because 120-21=99
The answer to that problem is 9600cm. each side of surface area will be the same multiplied together
She has totally 10+5+3=18 marbles, so the probability is 10/18=5/9. The complement is (9-5)/9=4/9.
Hope this helped!
18 that question is confusing so I guessed sorry dude
