81. Sales analysis. A company’s total sales (in millions of dollars) t months from now are given by S1t2 = 21t + 10 (A) Use the four-step process to find S′1t2. (B) Find S(15) and S′1152. Write a brief verbal interpretation of these results. (C) Use the results in part (B) to estimate the total sales after 16 months and after 17 months.

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

10 b/c 5*2 =10

step-by-step explanation:

16 is the absolute value

step-by-step explanation: