SOLUTION: susan needs to earn a B in her algebra class. her current test scores are 79, 81, 77 and 80. Her final exam is worth 2 test scores. Susan's average must end up between 85 to 90 (no

Question 1103649: susan needs to earn a B in her algebra class. her current test scores are 79, 81, 77 and 80. Her final exam is worth 2 test scores. Susan's average must end up between 85 to 90 (not inclusive). What range of scores can Susan receive on the final exam to earn a B in the course
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the average counting this test twice.

You also know that,

Substituting,

Assuming the max score she can get is 100.

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