document.write( "Question 230560: A student’s test scores are 86, 72, 85, and 90. What is the lowest score that
\n" ); document.write( "the student can get on the next test and still have a test average (mean) of at
\n" ); document.write( "least 80?
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Algebra.Com's Answer #170730 by edjones(8007)\"\" \"About 
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Let x=the next test score to give an average of 80
\n" ); document.write( "(86+72+85+90+x)/5=80
\n" ); document.write( "(86+72+85+90+x)=400
\n" ); document.write( "333+x=400
\n" ); document.write( "x=67
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