Answer:
x ≤ a → x ∈ (-∞, a]
x < a → x ∈ (-∞, a)
x ≥ a → x ∈ [a, ∞)
x < a → x ∈ (a, ∞)
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Therefore:
x ≥ 7.8 → [7.8, ∞)
x < 7.8 → (-∞, 7.8)
x ≤ 7.8 → (-∞, 7.8]
x > 7.8 → (7.8, ∞)
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Step-by-step explanation:
Answer:
The answer is A
Step-by-step explanation:

La respuesta correcta es
579
597
759
795
957
975
555
557
575
559
595
777
775
757
779
797
999
995
959
997
979
577
599
755
799
955
977
11 1/2 is your answer good luck!