Question 1096368
  Eric has scores of 71,81,& 85 on his history tests.
 Use an inequality to find the scores he can make on his final exam to receive a B in the class.
 The final exam counts as three tests, & a B is received if the final course average is greater than equal to 80
:
let f = the score on final test 
{{{((71+81+85+3f))/6}}} => 80 
multiply both sides by 6
237 + 3f => 6(80)
3f => 480 - 237
3f => 243
f => 243/3
f => 81 to get at least a B