Answer:
Its divergent
Step-by-step explanation:
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5.21 would just be 5 or 5.2 depending on what place you need to round.
The equation would be -5+(-12), so the answer would be -17 :)
No.
If a rational number can be an integer, x and y could be 5.5 and .5, or something that adds up to (number).0. This means, if the two non-rational numbers add up, they could be irrational, but the result isn't.