Please answer correctly

63

Step-by-step explanation:

JK + KL = JL

7x+9 +9x+9 = 114

Combine like terms

16x+18 = 114

Subtract 18 from each side

16x+18-18 = 114

16x =96

Divide by 16

16x/16 = 96/16

x =6

We want to find KL

KL = 9x+9

    = 9*6 +9

    = 54 +9

   63

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.