Katherine earned 84, 92, 84, 74, and 70 on her first five tests. What is the minimum grade Katherine needs to earn on the next test to have a mean of 84?
the answer is to easy... its 99
99
Now all u guys do is add all them up then divide by how many numbers there are then you will get the answer of 99
BOI ITS 99 DUH
To find the minimum grade Katherine needs to earn on the next test in order to have a mean of 84, we need to determine the sum of her current test scores and the number of tests she has taken so far.
First, let's calculate the sum of her current test scores:
84 + 92 + 84 + 74 + 70 = 404
Next, let's determine the number of tests Katherine has taken so far, which is 5.
Now, let's use the formula for finding the mean:
Mean = Sum of the test scores / Number of tests
Using the formula, we can write the equation as:
84 = (404 + x) / (5 + 1)
Here, x represents the grade Katherine needs to earn on the next test.
To solve for x, we can algebraically manipulate the equation:
84 = (404 + x) / 6
Multiply both sides of the equation by 6:
6 * 84 = 404 + x
504 = 404 + x
Subtract 404 from both sides of the equation:
504 - 404 = x
Simplifying the equation:
100 = x
Therefore, the minimum grade Katherine needs to earn on the next test to have a mean of 84 is 100.
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81
(84 + 92 + 84 + 74 + 70 + x)/6=84
84 + 92 + 84 + 74 + 70 + x = 6*84