Answer: A
Step-by-step explanation:
CD bisects ∠BCD and ∠ACD, so
∠BCD = ∠ACD
5x - 20 = 3x - 2
-3x +20 -3x + 20
2x = 18
÷2 ÷2
x = 9
∠BCD = 5x - 20 = 5(9) - 20 = 45 - 20 = 25
∠BCD + ∠CDB + ∠DBC = 180°
25 + 90 + ∠DBC = 180°
115 + ∠DBC = 180°
-115 -115
∠DBC = 65°
