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NISA [10]
3 years ago
15

Math please help 10 points!

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
8 0

Answer:


Step-by-step explanation:

average= \frac{sum of scores}{number of tests}

80= \frac{79+81+77+x}{4}

80 x 4 = 79+81+77+x

320=237  + x

320-237 = x

83=x

so Marianne must score 83 points or higher on her last test

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