Find the value of x. F belongs to DG

PLEASE NEED ANSWER ASAP!

Graph the function =gx+2x3 and give its domain and range using interval notation.

The change in water level of a lake is modeled by a polynomial function, w(x). described how to find the x-intercepts of w(x) and how to construct a rough graph of w(x) so that the parks department can predict when there will be no chage in the water level. you may create a sample polynomial of degree 3 or higher to use in your explanations.

Matching equivalent expressions match each expression on the left to the equivalent on the right