document.write( "Question 453970: A student has an average of 72 on four exams. If the final exam is to count double, what score does she need to have an averge of 80? \n" ); document.write( "

Algebra.Com's Answer #311799 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!
\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "If his current average is 72 for 4 exams, then his total points have to be 4 times 72.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "If his final average for 4 exams plus a final that counts for 2 exams must be 80, then his final point total must be 6 times 80.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Subtract his current point total from his needed final total giving you the points he needs to achieve. Since the final counts as 2, this number will be 2 times the score he needs on the final.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "John
\n" ); document.write( "

\n" ); document.write( "My calculator said it, I believe it, that settles it
\n" ); document.write( "

$\"The$

\n" ); document.write( " \n" ); document.write( "

\n" );