document.write( "Question 995602: ali score 74 82 and 60 for three of his mathematics tests. What is the lowest mark he must score for his fourth test if he aims to achieve an average of at least 78 for the four tests? \n" ); document.write( "

Algebra.Com's Answer #614370 by phillywily(18) $\"\"$ $\"About$

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$\"%26%2365288%3B74%2B82%2B60%2Bx%29%2F4=78\"$
\n" ); document.write( " $\"%28216%2Bx%29%2F4=78\"$
\n" ); document.write( " $\"216%2Bx=78%2A4\"$
\n" ); document.write( " $\"216%2Bx=312\"$
\n" ); document.write( " $\"x=312-216\"$
\n" ); document.write( " $\"x=96\"$ \r
\n" ); document.write( "\n" ); document.write( "Hence, Ali must score at least 96 for his fourth test to achieve his goal.
\n" ); document.write( " \n" ); document.write( "

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