evaluate: $3x - 4y$ when $x = -2$ and $y = 3$

6
-6
18
-18

Question

evaluate: $3x - 4y$ when $x = -2$ and $y = 3$

6
-6
18
-18

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", "Signed Numbers" ] } ## Substitute the given values into the expression $$ 3x - 4y \quad \text{where} \quad x = -2, \ y = 3 $$ $$ 3(-2) - 4(3) $$ ## Perform the multiplications $$ 3(-2) = -6 $$ $$ 4(3) = 12 $$ $$ -6 - 12 $$ ## Subtract the integers $$ -6 - 12 = -18 $$

(A) 6

(B) -6

(C) 18

(D) -18

{ "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

Perform the multiplications

Subtract the integers

Answer: