Let's note the information.
This is what we know:
Every buttons came in packages of 30 per student.
Every bookmark came in packages of 50 per person.
Know, we need to do some multiplying.
30 x 400 & 50 x 400
Now solve.
30 X 400 = 12000.
So we now know that they have an estimated 12000 buttons total.
Now, we find x for bookmarks.
50 x 400 = 20000
That means total that estimated that 20000 bookmarks will be given.
32 is the outlier, cause it’s much bigger than the other numbers
The answer would be 19,728.19
Yes,you got the correct answer!
To prove x≥-32:

Therefore x≥32.
Hope it helps!
So c is located at -50 from 0, and d is 50 from 0. we could just say that c+d=?
0 is 50 away from c, so c=50, d is 50 away from 0 so d=50, now we just add 50+50=100, answer is 100
:)