The area is 128 inches squared.
Step-by-step explanation:
12 times 8 is 96, plus the two side triangles (32 when combined) is 128.
a+b+c=-1
a=1
b=-1
c=-1
So for this u just replace the letters
not sure about x+y=7
Its the third one for sure,,,,,
carbon and it has 4 valence electrons
