18 is greater than or equal to negative 2X.

I assume you mean 18>=-2x?

1) 18>=-2x

2) -9>=x

3) -9<=x (keep note you have to do this when dividing or multiplying by a negative)

So the answer is -9 is less than or equal to x

Hope this helped!

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step-by-step explanation:

center= (-2,0)

radius= sqrt2/2

step-by-step explanation: