Answer is 12.73
Use Pythagorean theory
Split square into two right triangles with diagonal line. To find the diagonal
a^2 + b^2 = c^2
9^2 + 9^2 = c^2
162= c^2
Take square root of both sides
12.73 = c
Answer:
B
Step-by-step explanation:
A. is not a real number, or square root -3
Negative numbers do NOT have a square root because it is negative
Answer:
-8 
Step-by-step explanation:
÷
=
x 12
=
= -8 