Can you guys help me out step by step easy and quick

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

As a salesperson you get $50/day and $3.60/each sales you make.if you want to make $60 in one day, how many sales would you need need to make ? a 3b 4c 5d 6 show work.

Tanyss's house has 25 windows. her brother has washed 22 of the windows. what percent of the windows has her brother washed?