document.write( "Question 162018: 7. What is the standard equation of the circle with radius 5, and center (-5,-1)? \r
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document.write( "A (x-5)^2 + (y-1)^2 = 25
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document.write( "B (x+5)^2 + (y+1)^2 = 25
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document.write( "C (x+5)^2 + (y+5)^2 = 5
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document.write( "D A circle cannot have a center at (-5,-1).
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document.write( "E (x-5)^2 - (y-1)^2 = 25
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document.write( "F (x+5)^2 - (y+1)^2 = 25\r
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document.write( "I used the formula for a circle and plugged the information in, and I got F for the right answer. But choice D is confusing me and i wanted to make sure F really is correct. Thank you! \n" );
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Algebra.Com's Answer #119400 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! for a circle of radius r, centered at (h,k); the general equation is \n" ); document.write( "__ (x-h)^2 + (y-k)^2 = r^2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "looks like B to me... \n" ); document.write( " |