The problem belongs to indirect variation.
formula for indirect variation is 
we have 

we know that 

now we need find
when 


Answer:
g^-1(x)=-(4)/(x+2)
Step-by-step explanation:
Answer:
A.
Step-by-step explanation:
The answer is A.
This is a problem on a venn diagram in which the problem determines the number of subscribers that are mutually heeding for channel A and channel B. The equation to be followed is
U = U' + A + B + AandB
Substituting,
8500 = 5140 + 2450+1980- AandB
AandB = 1070 subscribers
She has 11 friends,
20 of the balls=5 friends and the rest =6 friends. I may be wrong so check this for yourself to be sure. :)