Answer:
-15
Step-by-step explanation:

y - y₁ = m(x - x₁)
y - (-10) = -1⁴/₂₁(x - 6)
y + 10 = -1⁴/₂₁(x) + 1⁴/₂₁(6)
y + 10 = -1⁴/₂₁x + 7¹/₇
- 10 - 10
y = -1⁴/₂₁x - 3¹/₇
Hello there!
9 - 12r > -99
-12r > -108
r

9 is your first inequality.
-2r - 4 < -12
-2r < -8
r

4 is your second inequality.
I hope this helps!