Answer:
I think it would be -1 its hard to explain but I am very positive
Step-by-step explanation:
5 x 5 x 5
Expanded just means writing it out as you would solve it. So solving a cube would be multiplying the number by itself 3 times
We have been given the expression

We can rewrite the expression as 
In order to simplify the given expression, we can check if we have any common terms in the numerator and denominator.
We can write the term 72 which is in the numerator as 
Thus, the expression becomes

We can see that 4 is common in both numerator and denominator. Hence, we can cancel 4. Thus, we are left with

Therefore, we can rewrite the given expression as 54.
Yes, because if you have x=5 and x=10 they are parallel lines to each other.
it is a polygon and it would be a decagon since there are 10 sides