Answer:
4. 9
5. 5x
Step-by-step explanation:
its an isocoles
1a+1b(a+b-c)+1b+1c(b=c-a)+ 1a+1c(c+a-b)
1a+1b-c+1b +1c-a+1a+1c-b
1a+2b-c+a+1c-b
2a+1b+c this is the answer I think lol
a=-2
a-10/3=-4
a-10=-4*3
a-10=-12
a=-12+10
a=-2 is the best answer
A= 2.5
B= 7.9
C=2.0
D=1.6
Third option.
Hope it helped.
