match each expression to its value when $x = 4$:

$2x - 1$
$2x^2$
$x + 9$

7
32
13

Question

match each expression to its value when $x = 4$:

$2x - 1$
$2x^2$
$x + 9$

7
32
13

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "table_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Evaluating Expressions" ], "new_concepts": [ "Evaluating Quadratic Expressions" ], "current_concepts": [ "Evaluating Expressions", "Evaluating Quadratic Expressions", "Order of Operations" ] } ## Evaluate the first expression Using the *Evaluating Expressions* knowledge point $$ \begin{aligned} &x = 4\ &2x - 1 = 2(4) - 1 = 8 - 1 = 7 \end{aligned} $$ ## Evaluate the second expression Using the *Evaluating Expressions* knowledge point $$ \begin{aligned} &x = 4\ &2x^2 = 2(4^2) = 2(16) = 32 \end{aligned} $$ ## Evaluate the third expression Using the *Evaluating Expressions* knowledge point $$ \begin{aligned} &x = 4\ &x + 9 = 4 + 9 = 13 \end{aligned} $$ | Expression | Value when $x = 4$ | |---|---| | $2x - 1$ | 7 | | $2x^2$ | 32 | | $x + 9$ | 13 | { "subject": "Mathematics", "question_type": "Fill-in-the-blank", "knowledge_point": [ "Mathematics", "Algebra", "Evaluating Expressions" ] }

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QUESTION IMAGE

Question

Explanation:

Evaluate the first expression

Evaluate the second expression

Evaluate the third expression

Answer:

Expression	Value when \(x = 4\)
\(2x^2\)	32
\(x + 9\)	13