Answer
$$(−\infty,−1]\ or \ (25,\infty)$$
Work Step by Step
12h−3≥15h⟶ subtract 12h from each side
12h−3−12h≥15h−12h⟶ subtract
−3≥3h⟶ divide each side by 3
−3÷3≥3h÷3⟶ divide
−1≥h
OR
5>−0.2h+10⟶ subtract 10 from each side
5−10>−0.2h+10−10⟶ subtract
−5>−0.2h⟶ divide each side by -0.2; reverse the inequality sign
−5÷−0.2