Alg 1
posted by Tyler
To earn a B in your Algebra class, you must achieve an unrounded test average between 84 and 86 (inconclusive). You scored 86,85, and 80 on the first three tests of the grading period. What possible scores can you earn on the fourth and final test to earn a B in the course?

Reiny
so far you have a total of 251
lowest mark needed:
(251+x)/4 >84
251+x > 336
x > 85
highest mark needed:
(251+x)/4 < 86
251+x < 344
x < 93
possible scores are 86, 87, 88, 89, 90, 91, and 92
Question: why would you NOT want a score highter than 86 ?
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