lewiskavon171 lewiskavon171

19-01-2020
Mathematics

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8. There are three exams in a marking period. A student received grades of 75 and 81
on the first two exams. What grade must the student earn on the last exam to get an
average of no less than 80 for the marking period?

Respuesta :

owenthefay owenthefay

19-01-2020

Answer:

85

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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