SOLUTION: Alan needs to earn a B in his sociology class. His current scores are 77, 92, 83, and 80. His final exam is worth 4 test scores. In order to earn a B Alan's average must lie betwee

Algebra ->  Inequalities -> SOLUTION: Alan needs to earn a B in his sociology class. His current scores are 77, 92, 83, and 80. His final exam is worth 4 test scores. In order to earn a B Alan's average must lie betwee      Log On


   

Question 1073732: Alan needs to earn a B in his sociology class. His current scores are 77, 92, 83, and 80. His final exam is worth 4 test scores. In order to earn a B Alan's average must lie between 80 and 89 inclusive. What range of scores can Alan receive on the final exam to earn a B in the course?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the weighted average, A, so that,
80%3C=A%3C=89
80%3C=%2877%2B92%2B83%2B80%2B4T%29%2F8%3C=89
640%3C=332%2B4T%3C=712
308%3C=4T%3C=380
77%3C=T%3C=95