3 years ago

Solve the system by elimination x + y = 2 , –3x + 4y = 15

1 answer:

7 0

Answer:

x=−y+2, x= 4/3 Y -5

Step-by-step explanation:

(/=fraction btw and the Y goes in the middle of the line for the fraction!)

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Aleksandr-060686 [28]

You have to explain how you knew to use 55 and 120, not another option.

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Blizzard [7]

The formula of a midpoint SR:

$M\left(\dfrac{x_S+x_R}{2},\ \dfrac{y_S+y_R}{2}\right)$

We have

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Substitute:

$\dfrac{4+x_R}{2}=7\qquad|\cdot2\\\\4+x_R=14\qquad|-4\\\\x_R=10\\\\\dfrac{1+y_R}{2}=-5\qquad|\cdot2\\\\1+y_R=-10\qquad|-1\\\\y_R=-11$

<h3>Answer: R(10, -11)</h3>

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Answer:

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Step-by-step explanation:

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