The answer is 9.37 when it is rounded up.
if i helped can i get a brainiest answer please
C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21
12 ×4^4/4^2
=12×4^2
=12×16
=192
25 + 100i is correct because -5 squared is 25 and the the square root of -100 is 100i or 10i in its simplest form.

![\\ \sf{:}\implies side=\sqrt[3]{14}](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%7B%3A%7D%5Cimplies%20side%3D%5Csqrt%5B3%5D%7B14%7D)

Now

Cut it into 10 parts as per question(Open side means five sides hence it will be 5×2=10)

Now divide by previous side

Option D