evaluate: $2(x - 4) + 6y - z$ when $x = -1$, $y = 4$, and $z = 2$

32
12
14
-12

Question

evaluate: $2(x - 4) + 6y - z$ when $x = -1$, $y = 4$, and $z = 2$

32
12
14
-12

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Algebraic Evaluation", "Order of Operations" ], "new_concepts": [], "current_concepts": [ "Algebraic Evaluation", "Order of Operations" ] } ## Substitute the given values into the expression $$ 2((-1) - 4) + 6(4) - 2 $$ ## Simplify inside the parentheses $$ 2(-5) + 6(4) - 2 $$ ## Perform multiplications and combine terms $$ -10 + 24 - 2 = 12 $$

32

12

14

-12

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Algebra", "Algebraic Evaluation" ] }

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QUESTION IMAGE

Question

Explanation:

Substitute the given values into the expression

Simplify inside the parentheses

Perform multiplications and combine terms

Answer: