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OpenStudy (anonymous):
Steve has these scores on the exams for this semester: 89, 92, and 87. What score will he have to get on the fourth exam to have a final average of at least 90%?
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OpenStudy (anonymous):
average is all the values added divided by the number of values that you added. \[\frac{89+92+87+x}{4}=90\]
OpenStudy (anonymous):
All you have to do is solve for x which is the last test you have to take.
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