troycote69 troycote69
  • 23-05-2018
  • Mathematics
contestada

perform the requested operation or operations. f(x) = x-5/8 g(x) = 8x + 5 find g(f(x))

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HunnidBandzWeUp
HunnidBandzWeUp HunnidBandzWeUp
  • 23-05-2018
just to confirm is it x-5/8 or (x-5)/8
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sqdancefan
sqdancefan sqdancefan
  • 23-05-2018
We assume 
[tex]f(x)=\dfrac{x-5}{8}[/tex]
When this is written using plain text, parentheses are required in order to show what the numerator of the fraction is: f(x) = (x-5)/8.

g(f(x)) = g((x-5)/8)
 = 8((x-5)/8) +5
 = (x-5) +5
 = x

g(f(x)) = x
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