Answer:
b = 4.5
Step-by-step explanation:
a = 4
c = 6
c² = a² + b²
6² = 4² + b²
36 = 16 + b²
b² = 36 - 16
b² = 20
120+25x=45
-25 -25
120=20
120/20 20/20
120/20
x=6
B is correct on edge
y=4