Since an isosceles triangle has two angles that are the same, and one different, the 120 degrees would be the different one. 180-120= 60 degrees 60/2=30 degrees
Y=4x shows y as the total earnings and x as the number of windows
Just subtract the first numbers then add the last mumber
Let
x-------> the length side of the original cube
we have

Divide by
both sides

The system of equations is equal to
--------> equation 
--------> equation 
using a graphing tool
see the attached figure
we know that
the solution of the system of equations is the intersection both graphs
therefore
the solution is

therefore
<u>the answer is</u>

Answer:
4 brothers and 3 sisters
Step-by-step explanation: