3 years ago

Can someone help me please

Mathematics

1 answer:

Licemer1 [7]3 years ago

5 0

Answer:

21°

angles don't change in dilutions but lengths do

plssmark brainliesttt

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If f(x) =69-15x then f(f^-1(x))

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If f(x)=69-15x then $f(f^{-1}(x))=x$

Given :

$f(x)=69-15x\\$

Lets find out $f^{-1}(x)$ . The steps to find out f inverse are

Replace f(x) by y

$y=69-15x\\Interchange \; the \; variables\\x=69-15y\\solve \; for \; y\\x-69=-15y\\Divide \; by \; -15\\\frac{-x+69}{15} =y\\Replace \;y \;with \; f^{-1}\\f^{-1}=\frac{-x+69}{15}$