Answer:
x ≥ 3
Step-by-step explanation:
5x - 7 ≥ 8
5x ≥ 8 + 7 (You take the common terms to one side)
5x ≥ 15
x ≥
8/15
Since this is a right triangle
tan C = opp side / adjacent side
tan C = 8/15
8