$21 I believe (it's 1 am where I am so I'm not 100% sure but I think it's correct)
Answer:
49.6 is what y is equal to
Step-by-step explanation
4.5. because ⁼3=9, and 9 divided by 2 is 4.5
5
you use the formula a^2+b^2=c^2
a=3, b=4
3*3=9 and 4*4=16
16+9=25
square root of 25 is 5.
5 is the answer