Let n represent the number of the term of the sequence, with n=1 representing the first term of the sequence. Which formula represents the sequence? −3,−9,−27,...

A f(n)=−(3)n−1f of n is equal to negative 3 raised to the n minus 1 power

B f(n)=(−3)n−1f of n is equal to negative 3 raised to the n minus 1 power

C f(n)=(−3)nf of n is equal to negative 3 to the n th power

D f(n)=−(3)n

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

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.

the answer to the expression is 83

the two may have that, even a breakdown is probably offered