Answer:
?=9
Step-by-step explanation:
We have a special right triangle, the 45-45-90 triangle.
In a 45-45-90 triangle, the side lengths are x, and the hypotenuse is x√2.
Since we know that the side length is 9, this means that:

The ? is 9.
The answer is the one that has a denominator of X-5 :)
Answer: the second
one
Step-by-step explanation:
To do this question you need to multiply base times height. So it would be 24*17. After that, you should get 408 square feet.