Answer: 5x^4
Step-by-step explanation: When simplifying combine like terms, in this case all X's will be combined together to make x^4, the 5 would be left alone.
x*5*x*x*x= 5 * x*x*x*x = 5x^4
Answer:

Step-by-step explanation:
U can reduce this into

Which is a square.
Answer:
No Solution
Step-by-step explanation:
If you grouped like terms, you would get 
Both <em>n's</em> would cancel each other out.
I hope this helps! (If it's wrong, then tell me, I'll try to find the correct answer...)
Answer:2.50
Step-by-step explanation: