document.write( "Question 1119733: What are the domain and range of the function below?\r
\n" ); document.write( "\n" ); document.write( "D(x) = { x^2-2x-3 if x<4
\n" ); document.write( " 3x-7 if x≥4\r
\n" ); document.write( "\n" ); document.write( "A.Domain[-4,∞)
\n" ); document.write( " Range All real numbers \r
\n" ); document.write( "\n" ); document.write( "B.Domain (-∞,4)
\n" ); document.write( " Range (4,∞)\r
\n" ); document.write( "\n" ); document.write( "C.Domain All real numbers
\n" ); document.write( " Range [-4,∞)\r
\n" ); document.write( "\n" ); document.write( "D.Domain All real numbers
\n" ); document.write( " Range All real numbers
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Algebra.Com's Answer #735372 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
The domain is all real numbers, since x can be anything.
\n" ); document.write( "The range for 3x-7 with x>=4 is [5, oo)
\n" ); document.write( "For the quadratic, the vertex is the minimum and has x value of -b/2a=2/2 or 1
\n" ); document.write( "f(1)=-4
\n" ); document.write( "The range is from [-4, oo)
\n" ); document.write( "C
\n" ); document.write( "\"graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C3x-7%2Cx%5E2-2x-3%29\"
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