Raven has been babysitting to earn enough money to buy a concert ticket that costs $24. She already had $12 and she earned $20 babysitting. Which expression represents how much money Raven has left after she buys the concert ticket?
A) 12 – 20 – 24
B) 12 + 20 – 24
C) 24 – 12 + 20
D) 24 – 12 – 20

The answer is B

Step-by-step explanation:

You will have to add the 12 and the 20 then subtract it by 24

it would be:

c.parallelogram.

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.