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timofeeve [1]
3 years ago
14

Suma a trei numere este 30. Primul numar este de doua ori mai mare decat triplul celui de-al treilea numar si de doua ori mai ma

re decat al duilea numar. Care sunt numerele?
Mathematics
1 answer:
Sloan [31]3 years ago
4 0
 a + b + c = 30 ;
a = 6c ;
a = 2b ;

Then, c = a / 6 and b = a / 2 ;
a / 6 + a / 2 + a = 30 ;
a / 6 + 3a / 6 + 6a / 6 =  180 / 6 ;
10a = 180 ;
a = 18 ;
b = 9 ;
c = 3.

Good luck !

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8 0
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Urgent need the answers plz help.
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Answer:

(a) P" = (-4,-3)

(b) (x,y) \to  (4,-8)

Step-by-step explanation:

Given

P = (4,3)

Solving (a): Reflect across x and y-axis.

Reflection across x-axis has the following rules

(x,y) \to (x,-y)

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P' = (4,-3)

Reflection across y-axis has the following rules

(x,y) \to (-x,y)

So, we have:

P" = (-4,-3)

Hence, the new point is: (-4,-3)

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D_{o,2} \to dilate by a scale factor of 2

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(x,y) \to 2 * (x,y)

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(x,y) \to 2 * (2,-4)

Open bracket

(x,y) \to  (4,-8)

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