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3 years ago

13

Help! Question is attached.

1 answer:

irakobra [83]3 years ago

3 0

Look at the coefficient of x (the slope).

Is -2 positive or negative?

Since -2 is negative, The slope is negative.

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3 years ago

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2 years ago

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alexira [117]

$D:k-9\geq 0 \wedge k\geq0\\
D:k\geq 9 \wedge k\geq0\\
D:k\geq 9\\
\sqrt{k-9}-\sqrt k=-1\\
\sqrt{k-9}=-1+\sqrt k\\
k-9=(-1+\sqrt k)^2\\
k-9=1-2\sqrt k+k\\
2\sqrt k=10\\
\sqrt k =5\\
k=25

$

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2 years ago