document.write( "Question 1052294: eden made a rectangular mosaic using 256 one centimeter square tiles. she used exactly 80 cm wood to make the frame. what are the dimensions of her design? \n" ); document.write( "
Algebra.Com's Answer #667681 by rothauserc(4718)\"\" \"About 
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we have two equations in 2 unknowns
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\n" ); document.write( "let l be length and w be width, then
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\n" ); document.write( "1) 2l + 2w = 80
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\n" ); document.write( "2) l * w = 256
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\n" ); document.write( "solve equation 1 for l
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\n" ); document.write( "l = 40 - w
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\n" ); document.write( "substitute for l in equation 2
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\n" ); document.write( "(40 - w) * w = 256
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\n" ); document.write( "-w^2 +40w -256 = 0
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\n" ); document.write( "(-w +32) * (w -8) = 0
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\n" ); document.write( "w = 32 or w = 8
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\n" ); document.write( "by convention length > width, so
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\n" ); document.write( "length = 32 cm and width = 8 cm
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