Answer:
36
Step-by-step explanation:
Whenever something is to the power of 2, just think of the number multiplied twice :) Hoped this helped.
Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4² + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !
We can employ a simple repeated decimal trick:
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Alternatively, we can compute the partial sum of the series.
As 
, the second term vanishes and we're left with 
. Notice that this is really just a more formal version of the earlier trick.
Answer:
x=34
Step-by-step explanation:
Just take 47-13=34
Answer:
A) Fixed Expenses
Step-by-step explanation:
Because you pay every month
