Answer is 20, hope this helps BRAINLIEST?
Answer:
A. 131deg
B. 49deg
C. 131deg
Step-by-step explanation:
180-49=131deg
Opposite congruent angles are equal
Umm I believe 3?? Because 5x3=15
Answer:
37) ±√29 - 4
Completing the square utilizes this formula 
. We know that b=8, 8 can be plugged into this formula to get 
. Simplify to get 16. Now, we can add this into the equation to get 
. Subtract 26 to both sides, so the equation can equal to 0. 
would be the resulting equation. Now, let's use quadratic formula to find the solution. The quadratic formula is (-b+-√b^2-4ac) / 2a. Plug in all of our values to get (-8+-√8^2-4(1)(-13)/2(1). Simplify the equation to get ±√29 - 4.
38) ±√21 - 2
Let's use the same formula. b=4, so 
. Simplify to get 4. Add that into the equation to get 
. Subtract 8 on both sides, so the equation can equal to 0. 
would be the result. Use the quadratic formula again to find the solution. Plug in all of the values to get ±√21 - 2
If you're confused on any part of the explanation, feel free to ask :)
