Question

Find the value of x and the value of y? Please help!!!

Answer 1

X=16, y= $\sqrt{2}$

you can extend down a vertical line, so you know that portion of x is 7, and that side of the triangle is 9, since 45-90-45 triangles have 2 legs of equal length. 
then you know the other leg of the triangle is 9, and adding 9+7 x=16. to find y you can know that 45-90-45 triangles have sides in a $1:1:\sqrt{2}$ ratio, so this triangle is $9:9:9\sqrt{2}$