Answer:
Explanation:
D
Given
21 ≤ - 3(x - 4) < 30
Divide all intervals by - 3, reversing the inequality symbols as a result of dividing by a negative quantity.
- 7 ≥ x - 4 > - 10 ( add 4 to each interval )
- 3 ≥ x > - 6, that is
- 6 < x ≤ - 3 → D
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