Uhhh the 2's after the letters are exponents.. and how do I do this problem??

Me what is the value of x? showing work would be appreciated - ! : )

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

Triangle knm is what is true about the sides of knm