document.write( "Question 1174911: A friend has a 83%% average before the final exam for a course. That score includes everything but the final, which counts for 15% of the course grade. What is the best grade your friend can earn? What is the minimum score your friend would need on the final to earn a 75% for the course? Accurate to at least one decimal point \n" ); document.write( "
Algebra.Com's Answer #800422 by ankor@dixie-net.com(22740)\"\" \"About 
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A friend has a 83%% average before the final exam for a course.
\n" ); document.write( " That score includes everything but the final, which counts for 15% of the course grade.
\n" ); document.write( " What is the best grade your friend can earn?
\n" ); document.write( "Assume he get 100 on the final
\n" ); document.write( "15% of the grade is final, then 85% of the grade has an 83% average
\n" ); document.write( "100*15 = 1500
\n" ); document.write( " 83*85 = 7055
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\n" ); document.write( "totals: 8555 divide by 100 = 85.55% is the best grade he can get
\n" ); document.write( ":
\n" ); document.write( " What is the minimum score your friend would need on the final to earn a 75% for the course?
\n" ); document.write( "let x = min score on test
\n" ); document.write( "15x + 83*85 = 7500
\n" ); document.write( "15x + 7055 = 7500
\n" ); document.write( "15x = 7500 - 7055
\n" ); document.write( "15x = 445
\n" ); document.write( "x = 445/15
\n" ); document.write( "x = 29.67% on the final will give him 75% for the course\r
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