I think its c.
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Answer:

Step-by-step explanation:
Take out 4:
4(x^2-8x)-12
=4(x^2-8x+16-16)-12
=4(x^2-8x+16)-64-12
=4(x^2-4)^2 - 76
=
Answer:
25
Step-by-step explanation:
Answer:
20 cubic miles = 5.0872E+15 cubic inches
Step-by-step explanation:
it's a big number. hope this helps!
Answer:
20=5*-3+x or 20=-15+x or 35=x