document.write( "Question 902739: You score a 82 and 86 on the first 2 tests in your math class. You would like for your average after 3 tests to be at least a 90. Assuming that each test is worth 100 points. Is this possible? If not, why not? If yes, what score must you make to have at least a 90 average. I'm not very sure how to do this problem. \n" ); document.write( "
Algebra.Com's Answer #547492 by stanbon(75887)\"\" \"About 
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You score a 82 and 86 on the first 2 tests in your math class. You would like for your average after 3 tests to be at least a 90. Assuming that each test is worth 100 points. Is this possible? If not, why not? If yes, what score must you make to have at least a 90 average.
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\n" ); document.write( "Let the 3rd test score be \"x\".
\n" ); document.write( "Equation:
\n" ); document.write( "(82+86+x)/3 >= 90
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\n" ); document.write( "(168+x) = 270
\n" ); document.write( "x = 270-168
\n" ); document.write( "x = 102
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\n" ); document.write( "Ans: Impossible because you cannot get a score of 102 on the 3rd test.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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