377m total people can drink
Answer:

Step-by-step
explanation
explanation is attached to the picture
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Just rank every pair of numbers for example:
The first one is: 1,-3.
2•1-3•-3>12
2+9>12
11>12
That's Incorrect. The first pair of numbers doesn't match the inequality.
Now do the same thing to all the other pairs of numbers.
Answer:
17 1/2
Step-by-step explanation:
21 - 3 1/2 = 17 1/2