The answer should be -192. I could explain in the comments if you would like. :)
D(1-1/4)
=3/4d
3/4d represents the money saved on a pillow
She would save $9.12 by using the better sale! I hope this helped!:)
F(f-1x) will be equal to x
take a simple example
f(x) = 2x
so x = f(x) / 2
f-1(x) = x/2
f(f-1x) = 2 ( x/2) = 2 * x/2 = x
Answer:
10 11 12 13 14 15 16 17 18 19
10 10 11 12 13 14 15 16 17 18 19
Step-by-step explanation: