What is the value of a in the equation a = 2 + 3a + 10? 12 6 −6 −12

a=-6

Step-by-step explanation:

a=2+3a+10 Subtract 3a from both sides

-2a=2+10  Combine like terms

-2a=12 Divide by -2 on both sides

a=-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) the volume of the cone is 20/3 in3

hence, option a is correct.