Round 5.2 down to 5 and Round 6.7 to 7.
5+7=12
Answer:
x = 11
Step-by-step explanation:
The angles in a square are right , that is 90°
The diagonals bisect the angles , then
6x - 21 = 45 ( add 21 to both sides )
6x = 66 ( divide both sides by 6 )
x = 11
14/2 = 7
The answer can be either depending on it you have to reduce
Answer:
I think it's the first one... but I'm not pretty sure.

Rationalize.

This can be further simplified to the decimal:
-0.43006...
I hope this helps :)