Answer:

Step-by-step explanation:
The number of people who receive the email after t weeks can be modeled by the following equation.

In which P(0) is the initial number of poeple who received the email and r is the factor.
Karim sent a chain email to 10 of his friends.
This means that 
The number of people who got the email increases by a factor of 1.4 every week.
This means that 
So

Which expression gives the number of people who got the email after 6 weeks?

No it is not. Anything in the shaded area is a solution m. (4,3) is not in the shaded area so it is not a solution for the graphed inequality.
Step-by-step explanation:
Given
5x + 2x + 2 = 9x + 4
9x - 5x - 2x = 2 - 4
9x - 7x = - 2
2x = - 2
x = - 2 / 2
Therefore x = -1.