document.write( "Question 1144581: John gets scores of 88 and 78 on his first two tests. What score must he make to get an average grade of B, which is 80 points or greater?\r
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document.write( "I got 74.\r
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document.write( "Could someone please work this problem out so I could check my answer.
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document.write( "I'm unsure if I did everything correctly. \n" );
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Algebra.Com's Answer #765743 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Here is an alternative method for solving problems like this involving the average of numbers that are \"close together\". \n" ); document.write( "His first test is 8 points over the desired average. \n" ); document.write( "His second test is 2 points under the desired average. \n" ); document.write( "So his point total for the first two tests is 8-2 = 6 points over the desired average. \n" ); document.write( "So to get EXACTLY an 80 average his next test should be 6 points under the desired average. \n" ); document.write( "ANSWER: 80-6 = 74 \n" ); document.write( " |