50 points for whoever answers this 270 counter clockwise around the origin and then translate 5 units up

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate. in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Me because i don't understand how to do it.: )