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natali 33 [55]
2 years ago
11

On the last chemistry exams a student scored 83, 89, and 92. What score must the student earn on the next exam to have an averag

e of at least 90?
Mathematics
1 answer:
Dmitrij [34]2 years ago
5 0

In order to get an average of 90, the student needs to get a score of 96.

The average can be found by summing up all the numbers in a data set and then dividing it by the number of characters in that dataset.

Assuming the average is 90, and that the score the student needs to get is x, the formula would be:

<em>Average = Sum of scores / Number of scores </em>

90 = (83 + 89 + 92 + x) / 4

90 x 4 = 264 + x

x = 360 - 264

x = 96

The student needs to get a score of 96 on the last exam.

<em>Find out more at brainly.com/question/13406591.</em>

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<h3>Ratio and proportion</h3>

Fractions are written as a ratio of two integers. For instance a/b is a fraction.

If Anastacio distributed 4 4/5 kg of seed among several bird feeders and put 3/5 kg of seed in each feeder, the expression that represents the number of bird feeders that Anastacio filled is given as;

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