Answer:
D hope this helps
Step-by-step explanation:
The total angle sum of a triangle is 180°
As such, 180= 78 + 2s +4s
102= 6s
s=17
Answer:

Step-by-step explanation:
Given:



(segment addition postulate)
(substitution)
Solve for x
Collect like terms
Divide both sides by -1

Plug in the value of x



Answer:
Step-by-step explanation: is b