bigmouth804
15.07.2019 •
Mathematics
Which equation represents the graphed function? a. y = 4x – 2 b. y = –4x – 2 c. y =1/4 x – 2 d. y = –1/4 x – 2
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Ответ:
Ответ:
First we must calculate how much Kelly will pay for the original purchase of $96.60. With 15% off, she will only need to pay $82.11.
Next we must figure out how much gum Kelly will buy to make $96.60 go over $100, and it turns out that 5 packs of gum will be the fewest to make her qualify for the 20% discount.
Buying 5 packs brings Kelly's total up to $100.55 and with a 20% discount she will end up paying $80.44 instead.
Subtract the higher amount ($82.11) by the lower amount ($80.44) aka [$82.11 - $80.44] and we are left with a difference of $1.67
By buying the 5 packs of gum Kelly will save $1.67
$1.67