document.write( "Question 1147416: Margaret scored 55 points and 65 points on her first two tests on MAT 171. What must she get on the third test to get an average for the three tests of at least 70, so she can end with a C? All tests have a maximum of 100 points. You must set up your inequality and solve algebraically. \n" ); document.write( "

Algebra.Com's Answer #768740 by ikleyn(52782) $\"\"$ $\"About$

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document.write( " >= 70\r\n" );
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document.write( "55 + 65 + x >= 3*70\r\n" );
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document.write( "x >= 210 - 55 - 65 = 90.\r\n" );
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document.write( "ANSWER.  She must get at least 90.\r\n" );
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