3 years ago

8. There are three exams in a marking period. A student received grades of 75 and 81

Mathematics

1 answer:

tatuchka [14]3 years ago

3 0

Answer:

Step-by-step explanation:

Set up algebraic equation: (75+81+x)/3 ≥ 80

Multiply by 3 on both sides: 75+81+x ≥ 240

Subtract 75 and 81 from both sides: x ≥ 85

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