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erastova [34]
2 years ago
6

Please help! I will give 20 points

Mathematics
2 answers:
Svetllana [295]2 years ago
3 0

Answer:

45 = (45+18)

55 = (55+y)

55+y= (63 ×55) /45

y= 77- 55

y = 22 cm

45 = 63

x = 70

x= (45×70)/63

x = 50 cm

Nezavi [6.7K]2 years ago
3 0
The answer is 45 like the other person said
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Answer:

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The midpoint of an is me -2,-6 if the coordinates of a are 1,-4 what are the coordinates of b
nalin [4]

Given:

\text{ The midpoint of }\bar{AB}\text{ is }M(-2,-6).\text{ Co-ordinates of A are }(1,-4).

Required:

What are the coordinates of B?

Explanation:

We know the mid-point of of line between two points is:

(x,y)=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

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\begin{gathered} (-2,-6)=(\frac{1+x_1}{2},\frac{-4+y_1}{2}) \\ \text{ Equate Co-ordinates} \\ \frac{1+x_1}{2}=-2 \\ 1+x_1=-4 \\ x_1=-5 \\ and \\ \frac{-4+y_1}{2}=-6 \\ -4+y_1=-12 \\ y_1=-8 \end{gathered}\text{ Point B is }(-5,-8)

Answer:

Hence, (-5,-8) is point B.

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