3 years ago

Could you please help with number 7?

Mathematics

1 answer:

just olya [345]3 years ago

7 0

Point C would be located at 1, -4 or 2, -4

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OlgaM077 [116]

hmmm let's find the distance between B and C first off.

$~~~~~~~~~~~~\textit{distance between 2 points} \\\\ B(\stackrel{x_1}{2}~,~\stackrel{y_1}{-2})\qquad C(\stackrel{x_2}{-1}~,~\stackrel{y_2}{2})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ BC=\sqrt{(~~-1 - 2~~)^2 + (~~2 - (-2)~~)^2} \implies BC=\sqrt{(-1 -2)^2 + (2 +2)^2} \\\\\\ BC=\sqrt{( -3 )^2 + ( 4 )^2} \implies BC=\sqrt{ 9 + 16 } \implies BC=\sqrt{ 25 }\implies BC=5$

hmmm if BC is that much, then AB + AC = 7, since AB + AC + BC = 12 which is the perimeter, Check the picture below.

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1 year ago

in one hour the temperatures in a city fell was from 4.5 Degree C to -5.4 degrees C . How many degrees celius did

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2 years ago

Make "a" the subject of:

slamgirl [31]

Answer:

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Step-by-step explanation:

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K^2(m-a)=x^2

m-a=x^2/k^2

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