Mathematics
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OpenStudy (anonymous):
I need help on these questions.
( Algebra II)
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OpenStudy (anonymous):
Here's the questions!
OpenStudy (anonymous):
Someone help me please!!
OpenStudy (anonymous):
Anybody there!
OpenStudy (anonymous):
for the first one, plug set g(x)=x, then plug that into f(x) and simplify
OpenStudy (anonymous):
so (6x)^2+3
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OpenStudy (anonymous):
Oh ok, and then?
OpenStudy (anonymous):
simplify that, and you have your answer
OpenStudy (anonymous):
Oh
OpenStudy (anonymous):
Ok
OpenStudy (anonymous):
think of the equation as (g(x))^2+3
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OpenStudy (anonymous):
and plug the value of g(x) into the function, which is 6x
OpenStudy (anonymous):
Ok, Got it! And for the next question?
OpenStudy (anonymous):
same thing, but with f
OpenStudy (anonymous):
you take f(x)=10-x, and make it into 10-f(x)
OpenStudy (anonymous):
then since f(x)=10-x, you plug that into 10-f(x)
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OpenStudy (anonymous):
which gives you simply x
OpenStudy (anonymous):
And add 3 into (x), Right?
OpenStudy (anonymous):
yup :)
OpenStudy (anonymous):
so the answer is?
OpenStudy (anonymous):
7
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OpenStudy (anonymous):
it may seem like 7 but it's not
OpenStudy (anonymous):
yu're not substituting x=3 into the original function
OpenStudy (anonymous):
oh
OpenStudy (anonymous):
you have to plug f(x) into the original f(x), if that makes sense
OpenStudy (anonymous):
Yes
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OpenStudy (anonymous):
f(x)=10-x, and x=f(x). So you plug it in, which is 10-(10-x).
OpenStudy (anonymous):
this simplifies to x
OpenStudy (anonymous):
Oh ya!
OpenStudy (anonymous):
so then you plug x=3 into that equation
OpenStudy (anonymous):
which gives you...?
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OpenStudy (anonymous):
3
OpenStudy (anonymous):
yup! yay! good for you.
OpenStudy (anonymous):
yay! Thanks! Your great! :)
OpenStudy (anonymous):
i'm glad I could help!