•simplify the expression: 13x2 + 5x-6) - (4x2 - 12x +17)
a. 7x2 - 17x-23
b. -x2 + 17x + 23
c. -x2 + 17x- 23
d. x2 - 17x-11

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.

i think it would be c

mark brainliest if im right

step-by-step explanation:

mississippi is the answer

i hope i rawr xd