document.write( "Question 907796: caleb's final exam was given 5 times the weight of a weekly test. the average of 15 weekly tests was 91. the overall weighted averagee was 85. what did caleb make on the final?
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Algebra.Com's Answer #550614 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! caleb's final exam was given 5 times the weight of a weekly test. the average of 15 weekly tests was 91. the overall weighted averagee was 85. what did caleb make on the final? \n" ); document.write( "-------------- \n" ); document.write( "Total pts. from 15 weekly test = 15*91 \n" ); document.write( "Total pts. from final (which counts as 5 tests) = 5x \n" ); document.write( "------------ \n" ); document.write( "Equation: \n" ); document.write( "average = (total points)/(15+5) \n" ); document.write( "--- \n" ); document.write( "85 = (15*91+5x)/20 \n" ); document.write( "1700 = 1365 + 5x \n" ); document.write( "5x = 335 \n" ); document.write( "x = 67 (His score on the final exam) \n" ); document.write( "---------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------- \n" ); document.write( " |