document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196938>Question 1196938</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangle has a width of 4 cm and a length of 10 cm. The rectangle is folded so that it creates a rectangle with a width of 4 cm and a length of 5 cm. The other rectangle has a width of 4 cm and a length of 5 cm. Write two expressions to show the area of the rectangle.\r<BR>\n" );
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document.write( "I got (4 x 5) + (4 x 5) and (4 x 5) x 2.\r<BR>\n" );
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document.write( "I am not sure if the expressions I got are correct, but I think they are because the rectangle has to have an area of 40 cm. Can you please help me with this question? </SPAN>\n" );
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document.write( "The 4 by 10 rectangle has a line down the middle to make two identical 4 by 5 rectangles.\r<BR>\n" );
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document.write( "The original 4 by 10 rectangle has area of 4*10 = 40 square cm\r<BR>\n" );
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document.write( "The smaller rectangles have area of 4*5 = 20 square cm each, so that doubles to 2*20 = 40 square cm.\r<BR>\n" );
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document.write( "We can either say:<BR>\n" );
document.write( "4*10 = 40<BR>\n" );
document.write( "or<BR>\n" );
document.write( "2*(4*5) = 2*20 = 40<BR>\n" );
document.write( "or<BR>\n" );
document.write( "4*5 + 4*5 = 20+20 = 40\r<BR>\n" );
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document.write( "What you posted of 4x5+4x5 and (4x5)x2 are both correct. This is of course assuming the x refers to multiplication (and not a variable). I used the asterisk symbol * to represent multiplication in the work shown above.<BR>\n" );
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