Question 943619

If f(x) = 3x - 9 and g(x) = x2, what is (g º f)(5)?
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{{{f(x) = 3x - 9}}}, and {{{g(x) = x^2}}}
{{{f(5) = 3(5) - 9}}}, or {{{f(5) = 6}}}
{{{g(f(5)) = g(6) = 6^2}}}, or {{{highlight_green(36)}}}