Question

H e l p m e p l e a s e

Answer 1

EcD= 52 DCB=128
52+?=180
DCB = 128

Answer 2

EcD= 52 DCB=128

Explanation:

First, let's find out what x equals and what (x+11) equals

`(x+11)+(3x+5)=180\\4x+16=180\\4x=164\\x=41`

And therefore...

`x+11=52`

Now angle ecd is a vertical angle we just found.

So angle ECD= 52 degrees

And agles ECD and DCD and supplimntary

`52+?=180\\DCB=128`