Question
vanessa wants a test average of atleast 90 and she has scores of 84, 91, and 89 on her first 3 tests. what score does she need on her final test
Answers
Answered by
GPT 3.5
Let's call the score Vanessa needs on her final test "x".
To find the average score, we need to add up all four test scores and divide by 4.
The sum of the test scores is 84 + 91 + 89 + x.
To find the average, we divide this sum by 4.
(84 + 91 + 89 + x) / 4 = 90.
Multiplying both sides of the equation by 4, we have:
84 + 91 + 89 + x = 360.
Combining like terms on the left side, we have:
264 + x = 360.
Subtracting 264 from both sides of the equation, we have:
x = 360 - 264.
x = 96.
Therefore, Vanessa needs to score at least 96 on her final test to achieve an average score of 90.
To find the average score, we need to add up all four test scores and divide by 4.
The sum of the test scores is 84 + 91 + 89 + x.
To find the average, we divide this sum by 4.
(84 + 91 + 89 + x) / 4 = 90.
Multiplying both sides of the equation by 4, we have:
84 + 91 + 89 + x = 360.
Combining like terms on the left side, we have:
264 + x = 360.
Subtracting 264 from both sides of the equation, we have:
x = 360 - 264.
x = 96.
Therefore, Vanessa needs to score at least 96 on her final test to achieve an average score of 90.
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