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grandymaker [24]
3 years ago
15

1. On the last 5 quizzes, Marco has earned a total of 21 out of 25 possible points. If he has a perfect

Mathematics
1 answer:
Nonamiya [84]3 years ago
3 0

The number of points Marco needs to bring his average up to 90% is 15points.

If there's a possible 25 possible points, and Marco has taken 5 quizzes;

Evidently, each quiz has weighs 5 points.

Mathematically;

\frac{21 + 5x}{5(5 + x)}  \times 100\% =  \frac{90}{100}

  • 2100 + 500x = 2250 + 450x

  • 50x = 150

x = 3.

Therefore, he needs 5x points = 15 points to bring his average up to 90%.

Read more:

https://brainly.in/question/24249798

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