Can you please help me thanks

Need this asap if anyone can i would be very grateful. if you could show workings that would really

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

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out