3
Answer: ASet 12: Linear Inequalities
Explanation
Solve:
A.
✓ Correct
B.
C.
D.
Detailed Explanation
Choice A is correct. Choice A is the correct answer. Isolate and reverse signs. 1. Subtract 3: 2. Divide by -2: (Reverse signs!) 3. Rewrite: Strategic Tip: When rewriting , start with the smallest number: . Choice B is incorrect because it swaps the strict/inclusive endpoints. Choice C is incorrect because it calculates endpoints incorrectly. Choice D is incorrect because it writes the interval backwards ( is impossible).
Key Steps:
•
The correct answer is
Why others are wrong:
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.
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