A) –9 + 3 = ?
b) -7 + ? = -9​

a) 6

And b u sure it's plus? not minus?

b because it contains 40% of the possible results from the random list.  

0,1,2,3 v 4,5,6,7,8,9  

4 integers to 6 integers  

40% success vs 60% fail

step-by-step explanation:

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