PLEASE HELP I FORGOT EVERYTHING

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)