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aev [14]
3 years ago
15

If f(x) = 5x + 4, which of the following is the inverse of (fx)?​

Mathematics
1 answer:
lys-0071 [83]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = 5x + 4 ( subtract 4 from both sides )

y - 4 = 5x ( divide both sides by 5 )

\frac{y-4}{5} = x

Change y back into terms of x

f^{-1} (x) = \frac{x-4}{5}

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