Can someone give me the answers to this please

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Which expression is equivalent to sq-80

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)