document.write( "Question 640865: Going into the final exam, which will count as two tests, Amelia has test scores of 75, 84, 70, 63, and 94. What score does Amelia need on the final in order to have an average score of 80? \n" ); document.write( "

Algebra.Com's Answer #403470 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Going into the final exam, which will count as two tests, Amelia has test
\n" ); document.write( " scores of 75, 84, 70, 63, and 94.
\n" ); document.write( "What score does Amelia need on the final in order to have an average score
\n" ); document.write( "of 80?
\n" ); document.write( ":
\n" ); document.write( "Let x = final test score
\n" ); document.write( "Final counts a two test; put it in the equation as 2x:
\n" ); document.write( ":
\n" ); document.write( " $\"%282x+%2B+75+%2B+84+%2B+70+%2B+63+%2B+94%29%2F7\"$ = 80
\n" ); document.write( "add up the scores and multiply both sides by 7
\n" ); document.write( "2x + 386 = 7(80)
\n" ); document.write( "2x = 560 - 386
\n" ); document.write( "2x = 174
\n" ); document.write( "x = 174/2
\n" ); document.write( "x = 87% on the final, gives an average of 80 \n" ); document.write( "

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