document.write( "Question 1132777: almaz has taken two tests. her average score is 7 out of ten. the product of her score is 45. what did she score in each test
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Algebra.Com's Answer #749904 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "Since there are only two test scores, with an average of 7 out of 10, let the two scores be 7+x and 7-x. Then, since the product of her two test scores is 45,

\n" ); document.write( " $\"%287%2Bx%29%287-x%29+=+45\"$
\n" ); document.write( " $\"49-x%5E2+=+45\"$
\n" ); document.write( " $\"x%5E2+=+4\"$
\n" ); document.write( " $\"x+=+2\"$

\n" ); document.write( "The two test scores are 7+x=9 and 7-x=5.

\n" ); document.write( "Of course, if an algebraic solution is not required, the question can be answered easily by trial and error -- what two numbers whose product is 45 have an average of 7? \n" ); document.write( "

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