Answer:
14
Step-by-step explanation:
This is a special type of right triangle called a 45 45 90
The sides have length a and the hypotenuse has length a* sqrt(2)
a = 7 sqrt(2)
the hypotenuse has length x
x = 7 sqrt(2) * sqrt(2)
x = 7 *2
x = 14
Answer:C
Step-by-step explanation:i would say C because its not a negative and it dosent go up 2 let me know if im wrong
So our equation currently is ⇒ 
<u>Let's first move all the constant to one side and group 'like variables' together</u>:

<u>Now lets complete the square of both equations</u>

<u><em>Now we know the circle's general equation format is</em></u>:
⇒
- (h, k) ⇒ coordinate of the center of the circle
- r ⇒ length of radius of circle
<u>Thus the radius of the circle is 7</u>
<u></u>
Hope that helps!