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 B​,
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 the​ course?

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

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

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    2. 👎
  3. oops...

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

    1. 👍
    2. 👎

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