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Nikitich [7]
3 years ago
8

Cassie has test grades of 71, 78 and 83 on the first three tests in her

Mathematics
2 answers:
Neporo4naja [7]3 years ago
3 0

Answer:

x ≥ 88

Step-by-step explanation:

In order to have at least an average of 80 after 4 tests, the sum of her scores must be at least 80 * 4 = 320 so we can write the following inequality:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

x ≥ 88

Sphinxa [80]3 years ago
3 0

Answer:

Your correct answer to this problem is x ≥ 88

Step-by-step explanation:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

= x ≥ 88

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