Question

could someone check my answers for simplified form of expressions

Answer 1

D
A
A
A
?

Answer 2

12.
9x8y12
3x8y12
2x3y12
9x8y9

Answer 3

help please :(

Answer 4

Some hints:
\[x^0 = 1\]and\[(2x^3)^4 = 2^4*(x^3)^4 = 16x^{12}\]
And finally, the number of hints is also a hint :-)