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Mathematics 7 Online
OpenStudy (anonymous):

HELP? please =]

OpenStudy (anonymous):

OpenStudy (imstuck):

Do you know where to begin with this one? What to do first?

OpenStudy (imstuck):

Really it is very simple....promise!!!

OpenStudy (anonymous):

Honestly... i have nooo idea.. i SUCK at math

OpenStudy (anonymous):

im stuck.. lol

OpenStudy (imstuck):

No, you don't...you just don't know how to do this! Everyone learns sometime! Here we go with this. This is telling you to find f(x) when x = -7. When you get the answer for that (it will be a whole number or a fraction, I don't know yet!) plug whatever that answer is in for the x in g(x). So what is f(x) when x is -7?\[(-7)^{2}+6=\]What does that equal?

OpenStudy (anonymous):

55

OpenStudy (anonymous):

(-7)+8/(-7)?

OpenStudy (imstuck):

Good! Now plug 55 in for the x in the g function:\[\frac{ 55+8 }{ 55 }=?\]What you get here is your answer!

OpenStudy (anonymous):

im confused as to why ur using the 55 for the second one also..lmaoo idk

OpenStudy (imstuck):

A composite function like this one means that you apply the result from one into the other. That means that 55 is used for x in the g function.

OpenStudy (anonymous):

ohh see thats where i mess up... i think (-7) is used for all the xs.. lol

OpenStudy (anonymous):

i got 3033/55

OpenStudy (imstuck):

Here, you have g(f(-7)). That's the other way to write what you posted in your original question. It's a composite function. The result from the f(-7) (55) goes in for the x in the g function. See if you can reduce that at all. Your answer, I mean.

OpenStudy (imstuck):

WAIT!!! It's 55+ 8! That equals 63. 63/55

OpenStudy (imstuck):

I don't mean to be rude, but where did you get 3033?

OpenStudy (anonymous):

lol i was multiplying.. i reread it wrong..sorry i see where u get 63/55.. thanks for the help

OpenStudy (imstuck):

You're very welcome!

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