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d1i1m1o1n [39]
3 years ago
12

D is the midpoint of CE. E has coordinates (-6, -2), and D has coordinates (2, 2). Find the coordinates of

Mathematics
1 answer:
tatuchka [14]3 years ago
4 0

Answer:

(10,6)

Step-by-step explanation:

let c be x2,y2

then apply mid point formula

x=(x1+x2)/2

y=(y1+y2)/2

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siniylev [52]

well, we know that 213.90 includes the 15% gratuity, so if the meal price was say "x", namely that is the 100%, and we add 15% to that, then 100% + 15% = 115%, so 213.90 is really the 115%.

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\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 213.90&115\\ x&100 \end{array}\implies \cfrac{213.9}{x}=\cfrac{115}{100}\implies 21390=115x \\\\\\ \cfrac{21390}{115}=x\implies 186=x


so since we know the meal without the tip is 186 bucks, the tip was then 213.90 - 186 = 27.90.

but they got extra potato wedges with butter and the waitress was wearing her best hat, they added $20 more, so the tip ended  up as 27.90 + 20 = 47.90.

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