Express 49/9 as a decimal

Write the standard form of an equation with (see picture below)

Quadrilateral efgh was dilated with the origin as the center of dilation to create quadrilateral e'f'g'h'. the quadrilateral was dilated using a scale factor of 2.5. the lengths of the sides of quadrilateral efgh are given. what is the length of side f'g'?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i