15, 45, 135, 405,... Which recursive formula can be used to find the nth term of the sequence?
(Watch the notation in the answer choices!)
A. an = 3.an-1
a = 15
B. an = 3•an - 1
a = 5
C. an = an - 1 + 30
a = 15
D. an = an - 1 + 30
ai = 5
no
sty

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

think the answer would beb

f(y)= y^2-10y+25

step-by-step explanation: