document.write( "Question 401647: To get a B in math, Mary must average 80 on all tests. Suppose Mary has scored 60,72,98, and 85 on the first four test. What score does she need on the fifth test to receive a B. \n" ); document.write( "
Algebra.Com's Answer #284265 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! To get a B in math, Mary must average 80 on all tests. Suppose Mary has scored 60,72,98, and 85 on the first four test. What score does she need on the fifth test to receive a B. \n" ); document.write( ". \n" ); document.write( "Let x = score on fifth exam \n" ); document.write( "then \n" ); document.write( "(60+72+98+85+x)/5 = 80 \n" ); document.write( "(315+x)/5 = 80 \n" ); document.write( "315+x = 400 \n" ); document.write( "x = 85 \n" ); document.write( " |