Answer:
x = 45°
y = 15.41 units
Step-by-step explanation:
Given quadrilateral is a square. Each angle of square is 90°
Diagonal of square bisects the angle.

Answer:
107.20 euros.
Step-by-step explanation:
Let the amount she had initially be x euros.
Then we have the equation:
x - 0.40x - 0.35x = 26.80
x - 0.75x = 26.80
0.25x = 25.80
Multiply both sides by 4:-
x = 107.20 euros.
4r+5=3r+15
-3r -5
r=10
40+5=30+15
45=45
45+45=90
r=10