3 years ago

\begin{aligned} &y=-8x -3 \\\\ &x+y=7 \end{aligned} y=−8x−3 x+y=7

1 answer:

6 0

Answer:

just download conects

Step-by-step explanation:

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elena55 [62]

X+y = 15
x-y = 25
------------
2x = 40
x = 40/2
x = 20

y = 15-x
y = 15-20
y = -5

2x² - y² =
2*20² - (-5)² =
2*400 - 25 =
800 - 25 =
775

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Step-by-step explanation:

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3 years ago

\begin{aligned} &y=-8x -3 \\\\ &x+y=7 \end{aligned} ​ y=−8x−3 x+y=7 ​