Solve using substitution y = 3x x + y = 8

The answer is

x=2

y=6

Step-by-step explanation:

y=3x

x+y=8

Substituting equation 1 in 2:

x+y=8

x+3x=8

4x=8

x= 8/4 = 2

x=2

Substituting the value of x in equation 1 to find y:

y=3x

y=3x2

y=6

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.

a and c

step-by-step explanation: