Use the model to estimate the first year when the annual sales of pharmacies and drug stores will be less than $200 billion

the f

last graph i believe

step-by-step explanation:

worked it out i believe

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.