Will give brainliest to whoever answers correctly.
2 answers:
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let
x--------> the monthly fee
y--------> the administration fee
we know that
--------> equation
--------> equation
Multiply by equation
------> equation
Adds equation and equation
Find the value of y
therefore
the answer is
the administration fee is equal to
Answer:
84
Step-by-step explanation:
f(1)=4^1 - 1 = 3
f(4) = 4^4 - 1 = 255
rate of change =
(255 - 3) / (4 - 1) = 252 / 3 = 84