# What is the domain and range of # y = sqrt(9 + x)#?

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The domain of the function ( y = \sqrt{9 + x} ) is all real numbers where ( 9 + x ) is non-negative, so the domain is ( x \geq -9 ). The range is all real numbers where ( y ) is non-negative, so the range is ( y \geq 0 ).

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