document.write( "Question 386356: a student scores 75 and 85 on 2 exams each of which count for 40% of the couse grade. the final exam counts for 20% of the course grade. what score must she get in order to have a average grade of 78% \n" ); document.write( "
Algebra.Com's Answer #273172 by robertb(5830)![]() ![]() You can put this solution on YOUR website! 0.4*75 + 0.4*85 + 0.2*x = 78; \n" ); document.write( "64 + 0.2x = 78; \n" ); document.write( "0.2x = 14; \n" ); document.write( "x = 70, the score she must get. \n" ); document.write( " |