document.write( "Question 783557: I do not understand how to get the answer 92 with this question:
\n" ); document.write( "A student earned scores of 87, 81, and 88 on the first 3 of 4 tests. if the student wants an average of exactly 87, what score must be earned on the fourth test?
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Algebra.Com's Answer #476833 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "If the final average of 4 tests is to be 87, then the sum of all 4 tests must be 4 times 87. Add the scores of the first three tests, then subtract that result from the result of multiplying 4 times 87.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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