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Lana71 [14]
2 years ago
7

The original price of a watch was $109.it was on sale for 100.28.what was the discount rate

Mathematics
1 answer:
Romashka-Z-Leto [24]2 years ago
5 0
\$109-\$100.28=\$8.72\\\\\frac{\$8.72}{\$109}=\frac{8.72}{109}\cdot100\%=\frac{872}{109}\%=8\%\leftarrow answer
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(-b </span>± √((b)² - 4ac))/(2a)

in your equation x² + 11x + 7 ... a = 1, b = 11, and c = 7. what you do is you take the coefficients of every term, then plug it into your equation:
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not pretty, i know. but, regardless, you can simplify it:
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and you can't simplify it further. -11 isn't divisible by 2, and 93 doesn't have a perfect square that you can take out from beneath the radical. the ± plus/minus symbol indicates that you have 2 answers, so you can write them out separately:

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they look confusing, but those are your two factors. they can be simplified just slightly by changing the signs in the middle due to the -11:

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and how these would read, just in case the formatting is too confusing for you: x plus the fraction 11 + root 93 divided by 2. the 11s and root 93s are your numerator, 2s are your denominator.
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nirvana33 [79]

Don't know what you mean

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Answer:

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The question is asking for a dilation which is a transformation that makes an image proportionately smaller or larger by a scale factor. The scale factor is how much smaller or larger the shape will be, if the scale factor is between 0 and 1 then it will shrink, if it is greater than one then the image will stretch (be larger). In this case, the scale factor is 2, therefore the image will stretch. Since the center of dilation is the origin, to find the new coordinates simply multiply each x and y value by the scale factor. So A's original coordinates (-2,5) become (-4,10) and so forth. Therefore the equation for this dilation is (x, y) → (2x,2y).

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If you put them into to proportion
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