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02.11.2020 •
Mathematics
Select all the expressions that represent a 20% discount off the price of an item that originally costs d dollars.
0.8 – d
0.8d
d – 0.2
d – 0.2d
1 – 0.2d
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Ответ:
Well, if you substitute 2 and 6 on the first expression, the answer you get when x=2 is half of what you get when x=6
But for the second expression, the answers are not equivalent