3.5 module 3 post-test

if $f(x) = 2x - 4$, what is $f(5)$ ?

$f(5) =$

Question

3.5 module 3 post-test

if $f(x) = 2x - 4$, what is $f(5)$ ?

$f(5) =$

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "blank_filling_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Evaluating Expressions", "Linear Equations" ], "new_concepts": [ "Function Evaluation" ], "current_concepts": [ "Evaluating Expressions", "Linear Equations", "Function Evaluation" ] } ## Identify the function and input Using the *Evaluating Expressions* and *Linear Equations* knowledge points $$ \begin{aligned} &f(x) = 2x - 4\ &x = 5 \end{aligned} $$ ## Substitute and calculate Using the *Evaluating Expressions* knowledge point $$ \begin{aligned} f(5) &= 2(5) - 4\ &= 10 - 4\ &= 6 \end{aligned} $$ If $f(x) = 2x - 4$, what is $f(5)$ ? $f(5) =$ 6 { "subject": "Mathematics", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Mathematics", "Algebra", "Function Evaluation" ] }

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Question

Explanation:

Identify the function and input

Substitute and calculate

Answer: