What would be the equivalent discount for this item be?

Mathematics

1 answer:

sertanlavr [38]3 years ago

7 0

Answer:

it's almost $100 and there's $17 off. so 99.99-17 would make the exact cost 82.99

82.99/99.99= 0.8299 so you payed 83% and that would make it so you got a 17% discount.

but if you didn't want to do all the math, you could've just rounded the 99.99 up to 100, and $17 would make it a 17% discount.

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seropon [69]

O.K.

(h; k) are the coordinates of the vertex.

On the graph are (3; 4), therefore we have:

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Substitute them in the equation:

$0=a(1-3)^2+4\\\\0=a(-2)^2+4\\\\4a+4=0\ \ \ |-4\\\\4a=-4\ \ \ \ |:4\\\\a=-1$

so. We have the answer:

$\boxed{f(x)=-(x-3)^2+4}$

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3 years ago

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3 years ago

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