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3 years ago

9

Jane paid $40 for an item after she received a 20% discount. Jane's friend says this means that the original price of the item w

as $48. is Jane's friend correct?
Yes
or
No

1 answer:

yanalaym [24]3 years ago

6 0

Answer:

Yes,

Step-by-step explanation:

$40+20%=$48 . Probably Jane's friend is correct

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there is no way to use common factor so use quadratic formula which is
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ax^2+bx+c=0 subsitte
a=1
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subsitute
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so the answers for x are $-8+\sqrt{102}$ and $-8-\sqrt{102}$ which are aprox -2.099504938362 and +18.099504938362
so it would be
(x-[-8+√102])(x+[8+√102])=0

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<span>f(x) = (x – 4)(x + 2),
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From given answers we can choose only </span>(-2,0).

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