document.write( "Question 837257: A student averaged 86% on his first two exams. What must he earn on his 3rd exam to have an A average? (assume an A=90%-100%). Write an inequality representing this situation and solve it. \n" ); document.write( "
Algebra.Com's Answer #504540 by sheldonbbtrocks(115)![]() ![]() You can put this solution on YOUR website! Well we could assume that this student got an 86% on all the exams, even though he probably not have, we need to add 3 numbers that average 86, and this is the easiest solution. Also, because he needs a 90% or better average on 4 exams, we must account for this by multiplying 90 by 4. This yields:\r \n" ); document.write( "\n" ); document.write( "86+86+86+x<=360\r \n" ); document.write( "\n" ); document.write( "Now solve:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "258+x<=360\r \n" ); document.write( "\n" ); document.write( "x<=102\r \n" ); document.write( "\n" ); document.write( "So John must somehow earn [102%] on his next exam to get an A average. \n" ); document.write( " |