Write an equivalent expression to x - 7y + 9.
Choose the correct answer below.
A. X- 7y + 9 = x-(-7y) +9
B. X- 7y + 9 = x + 9 + 7y
C. x - 7y + 9 = 9(x - 7y + 1)
D. X- 7y + 9 = x + 9+(- 7y)

b

Step-by-step explanation:

b idel

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 is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.