on her first two math tests, Gracie has an average score of 86. If she got a score of 92 on the first test, what is her score on the second test?
86 * 2 = 172
172 - 92 = 80
Second test score 80
To find out Gracie's score on the second math test, we need to use the concept of average. The average (also called the mean) is calculated by summing up all the numbers and dividing them by the total number of values.
In this case, we know that Gracie's average score for the first two math tests is 86. To find the sum of her scores on the first two tests, we multiply the average by the total number of tests (which is 2):
Sum of scores = Average score × Total number of tests
Sum of scores = 86 × 2
Sum of scores = 172
Since we know Gracie scored 92 on the first test, we can subtract that score from the sum of both scores to find out her score on the second test:
Second test score = Sum of scores - First test score
Second test score = 172 - 92
Second test score = 80
Therefore, Gracie's score on the second math test is 80.