Which equation could be used to find the length of the hypotenuse?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

(x-5)1/2+5=2 what is a possible solution?

Consider a= {x|x is alive} f={x|x is in france} m={x|x is a national monument} w{x|x is a woman}. which statements are true regarding elements of the given sets? check all that apply.