migueltocool123
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Which equations support the fact that rational numbers are closed under addition?

Select each correct answer.


13+13=23

9√+9√=29√

6√+(−6√)=0

2√+2√=22√

Respuesta :

choixongdong
do you mean
√9 + √9 = 2√9 


if so it is the answer
I think this first answer choice is supposed to be "1/3+1/3=2/3" (If so then that's the correct answer) and the second one answer would be √9+√9=2√9

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