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

and correct.

an unto under test average ??
(inconclusive) ??
threading period??

To determine the possible scores you can earn on the fourth and final test to achieve a B in the course, we need to consider the desired test average range.

To earn a B, your test average needs to be between 84 and 86. Since you have already taken three tests and received scores of 86, 85, and 80, we need to find the possible score range for the fourth test that will keep your average within the desired range.

Here's what we can do to calculate the possible scores:

1. Calculate the minimum average: To achieve an average of 84, you need to earn a total of 84 multiplied by the total number of tests (4) minus the total of your current test scores (86 + 85 + 80). In this case, your minimum score for the fourth test would be:

Minimum average = (84 * 4) - (86 + 85 + 80)
= 336 - 251
= 85

So, your minimum score on the fourth test to achieve a B would be 85.

2. Calculate the maximum average: To achieve an average of 86, you need to earn a total of 86 multiplied by the total number of tests (4) minus the total of your current test scores (86 + 85 + 80). In this case, your maximum score for the fourth test would be:

Maximum average = (86 * 4) - (86 + 85 + 80)
= 344 - 251
= 93

So, your maximum score on the fourth test to achieve a B would be 93.

Therefore, to earn a B in your Algebra class, you need to score between 85 and 93 on the fourth and final test.