Answer:
13
Step-by-step explanation:
(8 + 2)/(-2 - 1)= -10/3
c^2=a^2+b^2
c^2 = 12^2 + 5^2
C^2 = 144 +25
C^2 = 169
c=13
DF = 13
16
b^2
Let b= -4
(-4)^2