document.write( "Question 195544: Hi, I am having trouble figuring out this problem. What is the formula for figuring the height of a package when you have the base of the box?
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document.write( "I know there must be some formula to use to figure it out. Thank you. \r
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document.write( "Dimensions of a box. Rosita’s Christmas present from
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document.write( "Carlos is in a box that has a width that is 3 inches shorter
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document.write( "than the height. The length of the base is 5 inches longer
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document.write( "than the height. If the area of the base is 84 square
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document.write( "inches, then what is the height of the package? \n" );
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Algebra.Com's Answer #146660 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! a box that has a width that is 3 inches shorter than the height. \n" ); document.write( " The length of the base is 5 inches longer than the height. \n" ); document.write( " If the area of the base is 84 square inches, \n" ); document.write( "then what is the height of the package? \n" ); document.write( ": \n" ); document.write( "Let x = the height \n" ); document.write( "then \n" ); document.write( "(x-3) = the width (which is 3\" shorter than the ht) \n" ); document.write( "and \n" ); document.write( "(x+5) = the length (which is 5\" longer than the ht) \n" ); document.write( ": \n" ); document.write( "The area of the base: \n" ); document.write( "(x-3)*(x+5) = 84 \n" ); document.write( "x^2 + 2x - 15 = 84 \n" ); document.write( "x^2 + 2x - 15 - 84 = 0 \n" ); document.write( "x^2 + 2x - 99 = 0 \n" ); document.write( "Factor \n" ); document.write( "(x+11)(x-9) = 0 \n" ); document.write( "Positive solution is what we want here \n" ); document.write( "x = 9 inches is the height \n" ); document.write( ": \n" ); document.write( "; \n" ); document.write( "Check solution by finding the area of the base \n" ); document.write( "(9-3) * (9+5) = \n" ); document.write( "6 * 14 = 84 \n" ); document.write( " |