Please help me I will truly appreciate it

Answer:
I think it is 7.6
the square root of 58 is 7.6
7.6 x2 = y y/2= 7.6 again
Answer:
3.8
Step-by-step explanation:
a^2 +b^2=c^2
2^2+b^2=([tex]\sqrt{58}\\[/tex])^2
4/4=58/4
b^2=14.5
[tex]\sqrt{b^2} =\sqrt{14.5}[/tex]
b=3.8