Question

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?

Answer 1

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