Answer:
B is in 4th quadrant.
Step-by-step explanation:
If mid point of AB is on x-axis then and A is in 3rd quadrant then B must be on the opposite side of A.Therefore it is in 4th
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The second choice for the first problem and the third choice for the second problem
https://www.tiger-algebra.com/drill/3%7Cx-1%7C%3E=12/
Sources tiger algebra.com