Brian made 3 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 3 necklaces was $15.60. If the beads cost a total of $6.30, how much did each pendant cost?
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15.6-6.3=9.3

9.30 is the total for all 3 pendants

9.3/3=3.1

3.10 is the total for 1 pendant

(4,5

look up a corrdinate plane and do what the thingy says and boom

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.