C. Five less than 3 times a number

Which expression is not a polynomial?

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

Identify the number 127 as a rational or irrational. explain