Answer:
9
√
2
Step-by-step explanation:
1. Rewrite 162 as 
⋅2
2. factor 81 out of 162
3. Rewrite 81 as
4. Pull the terms from under the radical
![\sqrt[9]{2}](https://tex.z-dn.net/?f=%5Csqrt%5B9%5D%7B2%7D)
I hope this helps :)
-3x -3 < -63 subtract the 3 first
-3x < -60 then divide the -3 from both sides
x < 20 is your answer
answers B and D are clearly wrong and if u do some simple thinking you can determine the answer is C...
Have a fantabulous day! :)
Here, I'll do the first one for you.
When they are talking about a number, use "x".
Since it says twice a number, you say 2x. Or 3x for three times the number
2x+12=3x-31
Then use algebra to find x. Get the numbers on one side and all the x's on the other.
2x+12+31=3x-31+31
2x+43-2x=3x-2x
x=43
Now do the rest on your own!
