During a football game, the Warriors lost 11 yards on one play. On the next play, the team gained 7 yards. How many total yards were gained after both plays?

-4 yards

Step-by-step explanation:

The Warriors lost 11 yards in one play.

They then gained 7 yards in the next.

The total yards gained is therefore a sum of the yards lost and gained:

= -Yards lost + Yards gained

= - 11 + 7

= -4 yards

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.