dolphinsarethebest20 dolphinsarethebest20

24-04-2021
Mathematics

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Sarah will take 8 algebra tests. On the first 7, Sarah's scores were 79, 86, 92, 89, 87, 80, and 82. What will Sarah need to score on the 8th test to have an average grade of 86?

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welvis423 welvis423

24-04-2021

Answer:

Step-by-step explanation:

Let represent the score on Sarah's last test.

The average of her 8 test scores is 86.

This means:

(79+86+92+89+87+80+82+x)/8 =86

595+x=688

x=93

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