The number of text messages, y (in billions), sent in the United States since 2005 can be modeled using
the equation y=18.813)*,where x is the number of years after 2005. In what year were there
approximately 4,6 trillion text messages sent?

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.