About 7
because 5^2+5^2 is 50 and then you take the sq root of 50 which is about 7
Answer:

Step-by-step explanation:



or

Answer: 
Step by step:
This is the simplest form of this radical.
The answer is 6. I know that because I solved the question and I got 6 I'm positive its 6. Hope this helps.