Which of the following expressions is a polynomial? x^4+2x^3+5x^2-x+14

(x-y)/(3-x^2)

6/x-2

3x+2x-^3

In two fractions have the same denominator but different numerators,which fraction is greater? give an example

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

What is the least common multiple for 6 and 8? what is the least common multiple for 4 and 12 ? what is the least common multiple for 11 and 12? what is the least common multiple for 3 and 6?