Find the value of in each of the following x/5+1=5

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.

The area of a circle is equal to 1 dm². find the radius of the circle.