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Nonlinear functions SAT question

Math · Advanced Math · Easy · Answer it here, explanation included.

The function $f$ is defined by $f (x) = 6 + x$ . What is the value of $f (36)$ ?

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ExplanationShow

The correct answer is $12$ . The value of $f (36)$ is the value of $f (x)$ when $x = 36$ . Substituting $36$ for $x$ in the given equation yields $f (36) = 6 + 36$ , which is equivalent to $f (36) = 6 + 6$ , or $f (36) = 12$ . Thus, the value of $f (36)$ is $12$ .

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