document.write( "Question 222722: Jim's average score on three tests is 82. What is the least he can score on his fourth test so that his average will be at least 86?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #166742 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
Jim's average score on three tests is 82.
\n" ); document.write( "What is the least he can score on his fourth test so that his average will be at least 86?
\n" ); document.write( ":
\n" ); document.write( "Let x = the score on the 4th test
\n" ); document.write( ":
\n" ); document.write( " $\"%28%283%2A82%29%2Bx%29%2F4\"$ = 86
\n" ); document.write( ":
\n" ); document.write( " $\"%28246%2Bx%29%2F4\"$ = 86
\n" ); document.write( "Multiply both sides by 4
\n" ); document.write( "246 + x = 4(86)
\n" ); document.write( ":
\n" ); document.write( "246 + x = 344
\n" ); document.write( ":
\n" ); document.write( "x = 344 - 246
\n" ); document.write( ":
\n" ); document.write( "x = 98 for his average to be 86
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check on calc (3(82)+98)/4 = 86 \n" ); document.write( "

\n" );