Expand and simplify please as new as soon as

Just tell me how to set up the equation.

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

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?