What is y=2x-10
2y=x-8 using substitution

x=4, y=-2.

Step-by-step explanation:

y=2x-10

2y=x-8

2(2x-10)=x-8

4x-20=x-8

4x-x-20=-8

3x-20=-8

3x=-8+20

3x=12

x=12/3

x=4

y=2(4)-10

y=8-10

y=-2

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.

sorry not sure

step-by-step explanation: