Subtract. Write the difference in simplest form.
(5n - 3) - (-2n + 7)
7n - 10
3n + 4
3n - 10
7n + 4

7n - 10.

Step-by-step explanation:

(5n - 3) - (-2n + 7)

= 5n - 3 + 2n - 7    (Distributing the negative over the second parentheses).

= 5n + 2n - 3 - 7

= 7n - 10.

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.

n

step-by-step explanation: