document.write( "Question 680394: Tammy has scored 79 ,89 ,91 , and 60 on her previous four tests. What score does she need on her next test so that her average (mean) is 77? \n" ); document.write( "

Algebra.Com's Answer #422311 by ReadingBoosters(3246) $\"\"$ $\"About$

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$\"%28%2879%2B89%2B91%2B60%29%2Bx%29%2F5+=+77\"$
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\n" ); document.write( " $\"%28319%2Bx%29%2F5+=+77\"$
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\n" ); document.write( "319+x = 5(77)
\n" ); document.write( "319 + x = 385
\n" ); document.write( "x = 385 - 319
\n" ); document.write( " $\"highlight_green%28x+=+66%29\"$ on the next test
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