document.write( "Question 350353: A 16 by 20-inch mounting board is used to mount a photograph. How wide a uniform border is needed if the photograph occupies 3/5 of the area of the mounting board? \n" ); document.write( "

Algebra.Com's Answer #250450 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "Let

represent the width of the uniform border. Then the dimensions of the picture must be

and

. The area of the overall picture and mounting board is

in² --

of which is 1920 in².\r
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\n" ); document.write( "\n" ); document.write( "So:\r
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\n" ); document.write( "\n" ); document.write( "Multiply out the binomials, collect terms, put the equation into standard quadratic form, and then solve for

, the width of the border.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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$\"The$

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