For this case we have that by definition, the volume of a cube is given by:

Where:
l: It's the side of the cube
According to the statement we have:

Substituting we have:

Thus, the volume of the cube is 
ANswer:
The volume of the cube is 
Answer:
So sorry! Wish I could help : /
Step-by-step explanation:
Answer:
3x - 9
Step-by-step explanation:
We already have the expression 4x + 2x − 3x − 9. Now, we just have to add like-terms. This will give us 3x - 9.