Write a function, d(x) to account for the total after discounts on purchase amount x but before taxes and fees. A d(x)=x - 10 B d(x)=x - .10x C d(x)=x/.10x D d(x)=x + 10x E d(x)=x + .10 F d(x)=x - 10x

go and ask your mom to you

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

i would say true? if the unit was informational and it "refreshed your understanding", then true.