document.write( "Question 284710: 3. Ginger over the course of an average work-week wanted to see how much she spent on lunch daily. On Monday and Thursday, she spent $5.43 total. On Tuesday and Wednesday, she spent $3.54 on each day. On Friday, she spent $7.89 on lunch. What was her average daily cost?\r
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document.write( "answer: $4.08\r
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document.write( "This question is from a practice placement test for SMC. here is the url
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document.write( "http://www.testprepreview.com/modules/averagesandrounding.htm\r
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document.write( "Taking the average of an average is already confusing but this problem goes beyond that. I tried using matrixes but it wont work since we have two equations but three variables. (the equations being derived from the meaning of average--such as adding two days and dividing by two)I also tried trial and error but it still did not work.\r
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document.write( "thank you for your time \n" );
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Algebra.Com's Answer #206532 by edjones(8007)![]() ![]() You can put this solution on YOUR website! 5.43 \n" ); document.write( "3.54 \n" ); document.write( "3.54 \n" ); document.write( "7.89 \n" ); document.write( "-----add \n" ); document.write( "20.40 \n" ); document.write( ". \n" ); document.write( "20.40/5 = 4.08 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |