Answer:
Step-by-step explanation:
(3b)³ = 3³·b³ = 27b³
12a-(4b+4a)-b
12a-4b-4a-b
=> 8a-5b
The answer is A,

. This is because when plugging in -2 for x, the expression will look like this:

. To make the exponent positive, you have to flip it into a fraction. Then it will be

. Lastly, you simplify the denominator into 81.
Answer:39
Step-by-step explanation:
90-51=39