Mathematics: If f(x) = x and g(x) = 2x + 7, what isf[90x)] when g(x) = 11?

If f(x) = x and g(x) = 2x + 7, what isf[90x)] when

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Alexaisokay1

10.03.2022

$\bf \begin{cases} f(x) = x\\ g(x) = 2x+7 \end{cases}~\hspace{7em}g(x)=11\implies \stackrel{g(x)}{11}=2x+7 \\\\\\ 4=2x\implies \cfrac{4}{2}=x\implies \implies \boxed{2=x} \\\\[-0.35em] ~\dotfill\\\\ f[90x]\implies f\left[90\left( \boxed{2} \right)\right]\implies f(180)=\stackrel{x}{180}$

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Ответ:

aud50

28.02.2021

Mathematics

I don’t know what answer

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If f(x) = x and g(x) = 2x + 7, what is
f[90x)] when g(x) = 11?

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