Answer:
Step-by-step explanation:

Answer: 2
Step-by-step explanation: That expression is a binomial in any case the terms in a polynomial are separated by a plus or minus sign (+,-) so you can determine the number of terms by counting how many number or variable are being separated (ex: 3a+a-1 would have 3 terms and be a trinomial)
Im not sure about the percent but as a decimal its <em><u>1.6</u></em>
Step-by-step explanation:
hope my answer will help you