Which is the best description of the equivalency of the two expressions? expression 1: 5x^2-2x-4+6x+3 expression 2: 6x^2-6x+6-x^2+10x-7 a: the two expressions are not equivalent because when x=2, the two expressions do not have the same value. b: the two expressions are not equivalent because when they are simplified, they do not have the same coefficients for the x^2 and x terms. c: they are equivalent because the sum of the constants is the same in both expressions d: they are equivalent because when x=2, the two expressions have the same value

The answer is D because I just took my quiz and got it right:)

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.