Let the supplement be s.
180=s+115 => s=180-115= 65 degrees
Answer:
D
Step-by-step explanation:

factoring out a negative
The number of combinations of the 8 candidates taken 4 at a time is:
I suggest using desmos (an app)
Answer:
m3=43°
Step-by-step explanation:
The total has to add up to 180° so 180-137 = 43°