Answer:
1= Not equal 2=Not equal 3=Equal 4=Not equal 5=Not equal
Step-by-step explanation:
The answer is: m=f/a. use reverse operations so that m is now the subject
Since the legs are the same length, we know that the remaining two angles must be the same.
120+2x=180
2x=60
x=30
Final answer: x=30 degrees
I don't get how it would be a system of equations.
To solve the inequality 

The numerator
is not factorizable.
so factor the denominator
:

Now take 
Then we get factor of the denominator as 
Thus 
Now 
Signs of 

is the required solution of the given inequality.