SOLUTION: A student has scores of 87.75, 89, and 91 on his first three tests. He needs an average of at least 90 to earn a grade of A. What is the minimum score that the student needs on th

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Question 945076: A student has scores of 87.75, 89, and 91 on his first three tests. He needs an average of at least 90 to earn a grade of A. What is the minimum score that the student needs on the fourth test to ensure a A?
Answer by lwsshak3(11628) About Me  (Show Source):
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A student has scores of 87.75, 89, and 91 on his first three tests. He needs an average of at least 90 to earn a grade of A. What is the minimum score that the student needs on the fourth test to ensure a A?
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%2887.75%2B89%2B91%2Bx%29%2F4=90
267.75+x=360
x=92.25
What is the minimum score that the student needs on the fourth test to ensure a A? 92.25