Guys I'm going to graduate college this year and I'm still struggling with this question! Whats 10+9? Please respond ASAP!

Recall the definition of a polynomial expression. find two polynomial expressions whose quotient, when simplified,is. use that division problem to determine whether polynomials are closed under division. then describe how theother three operations-addition, subtraction, and multiplication-are different from division of polynomials.

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Find the least common denominator for thesetvo rational expressions.n^2/n^2+4n+4 -3/n^2+7n+10