Need help on 9 don’t know if I did it right or not but I need help :p

Answer:9b) -8 = y9a) 72° = m∠ABCStep-by-step explanation:Since you have an angle trisector, in this case, m∠CBE ≅ m∠DBA, therefore you set x equal to 8, plus, according to Morley's Trisector Theorem, all three angles form an equilateral triangle, so m∠BOC also has to equal 24°:[tex] {8}^{2} - 5(8) = 64 - 40 = 24 \\ \\ 6(8) - 24 = 48 - 24 = 24 \\ \\ 2(8) - y = 24 >> 16 - y = 24 >> -8 = y[/tex]Then, m∠ABC comes from multiplying 3 by 24 [three twenty-four's], which results in 72°.I am joyous to assist you anytime.