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

9b) -8 = y

9a) 72° = m∠ABC

Step-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°:

Then, m∠ABC comes from multiplying 3 by 24 [three twenty-four's], which results in 72°.

I am joyous to assist you anytime.

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign