Answer:
A
Step-by-step explanation:
pythagorean theorem
A^2+B^2=C^2 do that for all sides then add
Let bob score =x
according to given condition
(3x-40)/2=100
3x-40=200
3x=240
x=80
so bob score =80
Given.
(1)
(2)
Re-arrange equation (2)




Multiply equation (2) by -1

(3)
Combine like terms and solve.


Divide by (2y) and solve for (y).


Substitute (y) for equation (1).



Add (8) to both sides.


Divide by (3).


Check your work.








Your answers is
and 
There are many pairs you could do, but I'm going to choose this one:

You can multiply them together, and get (that's how you know if they are factors):

Hope this helped!
Answer:
(8, 18)
Step-by-step explanation:
Complete the square twice:
x^2 - 16x + y^2 - 36 = 0
x^2 - 16x + 8^2 + y^2 - 36 + 18^2 = 0 + 8^2 + 18^2
(x-8)^2 + (y-18)^2 = 388
Center: (8, 18)