document.write( "Question 757416: Jill scored 71, 88, and 75 on her three exams so far. What score does she need on her last exam so that her mean score is an 83? \n" ); document.write( "
Algebra.Com's Answer #460794 by John10(297)\"\" \"About 
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Hi,\r
\n" ); document.write( "\n" ); document.write( "For this problem, you can use the AVERAGE FORMULA to find the last score\r
\n" ); document.write( "\n" ); document.write( "AVERAGE SCORE = ( S1 + S2 + S3 + S4)/ 4 = 83\r
\n" ); document.write( "\n" ); document.write( "You know that S1 = 71, S2 = 88, and S3 = 75. You can find S4.\r
\n" ); document.write( "\n" ); document.write( "Best of luck :)
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