Answer:
7.157894736842105263
Step-by-step explanation:
(calculator)
√27
use the pythagorean theorem
3²+x²=6²
9+x²=36
x²=27
√x²=√27
x=√27
132
(a) -2-(-9)=-2+9
=7
(b) -2-9=-11
(c) -2-(-9)-(-2)=-2+9+2
=9
