document.write( "Question 260241: Going for a C. Professor Williams gives only a midterm
\n" ); document.write( "exam and a final exam. The semester average is
\n" ); document.write( "computed by taking 1/3 of the midterm exam score plus 
\n" ); document.write( "2/3 of the final exam score. To get a C, Stacy must have a
\n" ); document.write( "semester average between 70 and 79 inclusive. If Stacy
\n" ); document.write( "scored only 48 on the midterm, then for what range
\n" ); document.write( "of scores on the final exam will Stacy get a C?\r
\n" ); document.write( "\n" ); document.write( "I can not come up with the correct formula\r
\n" ); document.write( "\n" ); document.write( "70 < ? < 79
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Algebra.Com's Answer #191680 by drk(1908)\"\" \"About 
You can put this solution on YOUR website!
The inequality we need is the following:
\n" ); document.write( "\"70+%3C+%281%2F3%29m+%2B+%282%2F3%29f+%3C+79\"
\n" ); document.write( "since m = 48, we then get
\n" ); document.write( "\"70+%3C+%281%2F3%29%2A48+%2B+%282%2F3%29f+%3C+79\"
\n" ); document.write( "which is
\n" ); document.write( "\"70+%3C+16+%2B+%282%2F3%29f+%3C+79\"
\n" ); document.write( "subtract 16 from all parts to get
\n" ); document.write( "\"54+%3C+%282%2F3%29f+%3C+63\"
\n" ); document.write( "multiply all parts by 3/2 to get
\n" ); document.write( "\"81+%3C+f+%3C+94.5\"
\n" ); document.write( "
\n" );