Whats 9/-5 simplifyed to

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Select all the expressions that will include a remainder.