document.write( "Question 1145657: I want a 75 test average. I will have 3 test grades. I got a 72 and a 76 on the first two tests. What must I make on the third test to recieve a 75 test average? \n" ); document.write( "

Algebra.Com's Answer #766880 by ikleyn(52798) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "MENTAL solution\r
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document.write( "To have a 75 test average of 3 tests, you need to have the sum of these three tests as 3*75 = 225.\r\n" );
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document.write( "You just have 72 and 76 in two first tests.\r\n" );
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document.write( "Hence, you need to get  225 - 72 - 76 = 77.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "ALGEBRA solution\r
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document.write( " = 75\r\n" );
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document.write( "72 + 76 + x = 3*75 = 225\r\n" );
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document.write( "x = 225 - 72 - 76 = 77.      the same ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "To see other similar problems solved, to wider your horizon and to get more confidence, look into the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on average scores, weight, height and temperature\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on average scores\r
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