11.) A manager at a jewelry store buys jewelry at a whole sale cost of "x" . To set a price on the item in the store she first adds $25 and she calls this function "a(x)" . Then, she increases by 80% and calls this combined price increase "p(a(x))" . Create a function model that expresses the overall increase in price.

Guest Mar 1, 2017

#1**0 **

a(x) = x + 25

pa(x) = (x + 25) (1.80) = 1.80x + 45

The overall increase in price [above cost ] =

pa(x) - x =

1.80x + 45 - x =

.80x + 45

CPhill
Mar 1, 2017