Here is you're answer:
In order to get you're answer you need to find the common denominator then add.

- Find the common denominator:


- Simplify:
-


Therefore you're answer is option D "13/24."
Hope this helps!
It would be HL=I !!!!!!!!!!!!!!!!!!!!
hope this helps
For the first question: The equation would be set up as 30=1/2(12x) Then solve for x. (Or just plug that formula into Desmos)
Answer: x=5
3 7/8 Converted into decimal equals 3.875
7/8 = 0.875 + 3