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Mathematics 11 Online
OpenStudy (anonymous):

Let f(x) = -4x + 7 and g(x) = 10x - 6, find f(g(x)).

OpenStudy (anonymous):

just plug it in, all your doing is switching the sign and then solving

OpenStudy (anonymous):

yeah that's what I don't get

OpenStudy (anonymous):

fgt

OpenStudy (anonymous):

Whats fgt?

OpenStudy (anonymous):

a not so good word

OpenStudy (anonymous):

maybe he should hop his azz out of here, if he aint got nothin better to say

OpenStudy (anonymous):

he did

OpenStudy (anonymous):

im backkk ;)

zepdrix (zepdrix):

\[\Large f(\color{royalblue}{x})=-4\color{royalblue}{x}+7\] Plug g(x) into our blue x here.\[\Large f(\color{royalblue}{g(x)})=-4\color{royalblue}{g(x)}+7\] Plugging the actual function in on the right gives us,\[\Large f(\color{royalblue}{g(x)})=-4\color{royalblue}{(10x-6)}+7\]

OpenStudy (anonymous):

nobody give a F***

OpenStudy (anonymous):

so would it be -40x+64

zepdrix (zepdrix):

Hmm let's see.\[\Large f(g(x))=-4(10x-6)+7\] Distributing the -4 to each term in the brackets gives us,\[\Large f(g(x))=-40x+24+7\]

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