document.write( "Question 1131162: Mia’s scores on her four math tests were 87, 77, 68, 58. What does she need to make on the final ( which counts as two tests) to have an average of at least 80? \n" ); document.write( "

Algebra.Com's Answer #747775 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Mia’s scores on her four math tests were 87, 77, 68, 58.
\n" ); document.write( " What does she need to make on the final (which counts as two tests) to have an average of at least 80?
\n" ); document.write( ":
\n" ); document.write( "let n = her score on her final, which counts as 2 tests
\n" ); document.write( ":
\n" ); document.write( " $\"%28%2887%2B77%2B68%2B58%2B2n%29%29%2F6\"$ = 80
\n" ); document.write( "290 + 2n = 6(80)
\n" ); document.write( "2n = 480 - 290
\n" ); document.write( "2n = 190
\n" ); document.write( "n = 190/2
\n" ); document.write( "n = 95% on the final \n" ); document.write( "

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