Answer:
16
Step-by-step explanation:
20^2 - 12^2 =
400-144 =
256 = 16^2
use formula a^{2}+b^{2}=c^{2}
So we have an equation:
2w=12-4w
Firstly, let's simplify, and divide all terms by 2:
w=6-2w
Now, we add 2w over to the other side:
3w=6
And finally, we divide both sides by 3:
w=2
Hope this helps!
Answer:
F
Step-by-step explanation:
the square root of 51 = 7.141
7 square root 2 = 9.899
7 = 7
8 = 8
Answer:
I think it is B,D, and E. Hope that helps.
Answer:

Step-by-step explanation:
Solve for y in the first equation.
, replace y with 
Solve for in the first equation.

<em>good luck, hope this helps :)</em>