7+(x+5) would be the answer because sum means addition and it says x and 5. then it says 7 plus that so you put 7. In reality you wouldn't need parenthesis, but if you want it to match the phrase, you can put it in parenthesis.
Answer:
As=0.13
Step-by-step explanation:
If we have central angle we use this rule to find area of sector :

C is central angle. r is radius.

Evaluate :

It should be -1 I believe.
Just divide 300 by 450, to get 0.66667, which can be expressed as a fraction by 2/3
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!