document.write( "Question 1207382: Going into the final exam,which will count as two-thirds of the final grade,Mike has test scores of 86,80,84,and 90.What score does Mike need on the final in order to earn a B,which requires an average score of 80? What does he need to earn an A,which requires an average of 90? \r
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\n" ); document.write( "\n" ); document.write( "Let x = grade needed on final exam to earn a B.\r
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\n" ); document.write( "\n" ); document.write( "(86 + 80 + 84 + 90 + x)/5 = 80\r
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\n" ); document.write( "\n" ); document.write( "Let y = grade needed on final exam to earn an A.\r
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\n" ); document.write( "\n" ); document.write( "(86 + 80 + 84 + 90 + y)/5 = 90\r
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Algebra.Com's Answer #845238 by mccravyedwin(406)\"\" \"About 
You can put this solution on YOUR website!
Going into the final exam,which will count as two-thirds of the final grade,
\n" ); document.write( "Mike has test scores of 86,80,84,and 90.What score does Mike need on the final
\n" ); document.write( "in order to earn a B,which requires an average score of 80? What does he need to
\n" ); document.write( "earn an A,which requires an average of 90?
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document.write( "For the final exam to count 2/3, to figure his score for the course, Mike must\r\n" );
document.write( "add his final exam grade 2 times and his test average only 1 time and divide by\r\n" );
document.write( "3.\r\n" );
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document.write( "Let his required final exam grade be x\r\n" );
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document.write( "His test average is\r\n" );
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document.write( "\"86%2B80%2B84%2B90%29%2F4\"\"%22%22=%22%22\"\"340%2F4\"\"%22%22=%22%22\"\"85\"\r\n" );
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document.write( "His score for the course = \"%28x%2Bx%2B85%29%2F3\"\"%22%22=%22%22\"\"%2885%2B2x%29%2F3\"\r\n" );
document.write( "\r\n" );
document.write( "\"%2885%2B2x%29%2F3\"\"%22%22=%22%22\"\"80\" to get a B\r\n" );
document.write( "\"85%2B2x\"\"%22%22=%22%22\"\"240\"\r\n" );
document.write( "\"2x\"\"%22%22=%22%22\"\"155\"\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"77.5\"\r\n" );
document.write( "\r\n" );
document.write( "\"%2885%2B2x%29%2F3\"\"%22%22=%22%22\"\"90\" to get an A\r\n" );
document.write( "\"85%2B2x\"\"%22%22=%22%22\"\"270\"\r\n" );
document.write( "\"2x\"\"%22%22=%22%22\"\"185\"\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"92.5\"\r\n" );
document.write( "  \r\n" );
document.write( "Edwin
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