Select all the expressions that represent a 20% discount off the price of an item that originally costs d dollars. A 0.8 – d B 0.8d C d – 0.2 D d – 0.2d E1 – 0.2d

Step-by-step explanation:

C is the correct answer

Step-by-step explanation:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)