Answer:
The whole triangle is 180° , and means + in math
15-x + 2x= 180
-x+2x=180-15
-x+2x=165
2x=165
2x/2=165+/2
=82.5
Answer:

Step-by-step explanation:

Answer: 9
Step-by-step explanation:
isn't it obvious
Answer:
1:3.5
sorry if I'm wrong I really know it but still serve them wrong
Step-by-step explanation: