Y=4 is the answer for this
Well I'm still trying to solve the first question so I'll tell you the other answers
the answer for the second question is :

and for the third question :
The correct answer is the first option which is negative 2
X is equal to 2. you can set them equal to each other because they are corresponding angles, which means they are congruent.
A =πr2
Π = 3.14
r = ½diameter = 25/2 =12.5 inches
∴ Area = 3.14 × 12.5 × 12.5 square inches
Area = 490.625 square inches