Help Me!I dont understand it!

D

Step-by-step explanation:

on a graph if you add numbers to the x variable you move to the right, if you are subtracting from the x variable then you move to the left. If you are adding numbers to the y variable then you are going to be moving up, and if you are subtracting then you are going to be moving down. So 3 units to the left is subtracting 3 from a plot. So that narrows it down to an answer with 2^x-3...

Then we are also given the info that we are going 8 units down, therefor we subtract 8. So the answer should be D. y=(2^x-3)-8

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.