The inner square has sides of 3 inches and the outer square has sides
of 6 inches. what is the length, in inches, of
x? round your answer to the nearest hundredth.

X is the hypotenuse of an isosceles triangle. The length of the sides are the difference of the inner and outer squares divided by 2. Which means that the sides of the triangle is 1.5 inches. Using that information, the length of X can be deduced to be 2.12 inches using Pythagoras theorem

The answer is the first one

Bc equals mb that should be your answer