ALGEBRA

Ralph needs to earn a B in his Geology class. His current test scores are
82,83, 90, and 77. His final exam is worth
4 test scores. In order to earn a Bâ€‹,
Ralph's average must lie between
80 and 89 inclusive. What range of scores can Ralph receive on the final exam to earn a
B in theâ€‹ course?

1. 👍
2. 👎
3. 👁
1. 80 ≥ (4t + 82 + 83 + 90 + 77) / 8 ≥ 89

1. 👍
2. 👎
2. it works better if you use <=

1. 👍
2. 👎
3. oops...

89 ≥ (4t + 82 + 83 + 90 + 77) / 8 ≥ 80

1. 👍
2. 👎

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