To obtain a retail price, a dress shop adds $20 to the wholesale cost x of every dress. When the shop
has a sale, every dress is sold for 75% of the retail
price. If f(x) = x + 20 and g(x) = 0.75x, find [gf](x)
to describe this situation.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

i would you but i don't under stand the qustion

step-by-step explanation: