The expressions that represent a 20% discount off the price of an item are B. 0.8d and D. d-0.2d.Therefore , B. 0.8d ,D d-0.2d is correct .
Let's analyze each expression and see which ones represent a 20% discount off the price of an item:
A. 0.8-d
0.8 represents 80% of the original price. Subtracting 0.8 from the original price (d) would result in a decrease of 80%, not a 20% discount.
This is not the correct answer.
B. 0.8d
0.8 represents 80% of the original price. Multiplying the original price (d) by 0.8 would result in a decrease of 20%.
This is the correct answer.
C. d-0.2
Subtracting 0.2 from the original price (d) would result in a direct decrease of $0.2.
This is not equivalent to a 20% discount, and it's not accurate for all prices. This is not the correct answer.
D. d-0.2d
Subtracting 0.2d from the original price (d) would result in a decrease of 20%.
This is the correct answer.
E. 1-0.2d
Subtracting 0.2d from 1 would not result in a valid price. Prices cannot be negative.
This is not the correct answer.
Therefore, the expressions that represent a 20% discount off the price of an item are B. 0.8d and D. d-0.2d.
Question
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
E. 1-0.2d