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Consider the functions f(x) = 2(x − 9) and g(x) = 4x. What is the value of (f − g)(5)? 12 28 20 −28

Mathematics
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Just remember: (f-g)(5)=f(5)-g(5)
So what do i plug in?
Plug in 5 in both of the functions and subtract the outcomes.

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Other answers:

so, f(5) = 2(5-9) and g(5)=4 times 5?
now i am confused
simplify f(5) = ??? g(5) = ???
you got it right earlier... just need to simplify....
ohhh...
@Andrewisbadatmath: right, and if you've found f(5) and g(5), you calculate their difference: f(5) - g(5)
ok thank you
YW!
so it is -12?
no i meant 12
f(5) = 2(5-9) = 2*(-4)=... g(5) = 4*5 = ... f(5) - g(5) = ... (not 12)
You will get -8 - 20 = ...

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