Answer:
Step-by-step explanation:
It is given that, 
We need to find the value of 
As 
Solving LHS

Now comparing the coefficients of 
In LHS the coefficient of
is 25
In RHS the coefficient of
is 
It implies that, 
So, the value of
is 25.
Answer:

Step-by-step explanation:
Center is at (3, -4) and the radius is 2

3
Though there are seven people, it would only be 3 full committees. They would either find an eighth person or have a group of 3 with one of the committees.
Hope this helps!
Earning = 1000 + 25% commison
For sales of $2170:
= 1000 + 25%* 2170
= 1000 + 542.5 = 1542.5
Gross earnings = $1542.50