Step-by-step explanation: That's the answer on Ed.
It has a degree of 4. The last one isn't a polynomial because you can't divide by a variable. The second one has a degree of 5. And the first one does not fit the polynomial definition.
1+1+1+1+1+5+5+5+5 is one 5+5+5+1+1+1+1+1+1+1+1+1+1 is another 5+5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is three 5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is four.
