question 3 (2.5 points)
evaluate: $2a - 25$ when $a = -6$
-37
-31
-23
-13

Question

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", "Multiplying Negative Numbers", "Integer Subtraction" ], "new_concepts": [], "current_concepts": [ "Algebraic Evaluation", "Multiplying Negative Numbers", "Integer Subtraction" ] } ## Substitute the value of a into the expression $$ 2a - 25 \implies 2(-6) - 25 $$ ## Multiply the numbers $$ 2(-6) = -12 $$ ## Subtract the integers $$ -12 - 25 = -37 $$

(A) -37

(B) -31

(C) -23

(D) -13

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

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Question

Explanation:

Substitute the value of a into the expression

Multiply the numbers

Subtract the integers

Answer: