Question
Dave has earned scores of 87, 81, 92, 88, and 83 on the first five of six math tests for the semester. He would like to finish the semester with a test average of at least 90. Find the score Dave needs to earn on the sixth test to achieve his goal.
- X ≥ 109
- X >109
- X > 86.2
- X< 86.2
Hint:
formula for finding average
The correct answer is: X ≥ 109
Dave has earned scores = 87, 81, 92, 88, and 83
He would like to finish the semester with a test average of at least = 90
so the test average score 
90
let Dave needs to earn on the sixth test score is X
so average of all the six score 90
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