Choose the property of addition that justifies the equation.

1. Associative Property

2. Commutative Property

3. Identity Property

Step-by-step explanation:

1. 2 + (b + 6) = (2 + b) + 6

Associative Property

2. (4 + x) + 6 = 6 + (4 + x)

Commutative Property

3. 0 + a = a

Identity Property

ddsf

step-by-step explanation:

dfs

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.