Answer:
The answer is the roman numeral ||.
Step-by-step explanation:
If you use the equation 
you will find the only one that works is roman numeral ||. This equation is for right triangles.
Yes I believe that these are correct
What do u need help with??
Answer:
Step-by-step explanation:
<u>Find b first:</u>
- b = 3/x + 3/y
- b = (3x + 3y)/xy
<u>Find 1/b:</u>
- 1/b = 1 : (3x + 3y)/xy
- 1/b = xy / (3x + 3y)
