SOLUTION: A student has scores of 86.5, 87, and 91.5 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

SOLUTION: A student has scores of 86.5, 87, and 91.5 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

Algebra.Com

Question 785660: A student has scores of 86.5, 87, and 91.5 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 xinxin(76) (Show Source): You can put this solution on YOUR website!
Suppose he needs to get a minimum score of X, then
(86.5+87+91.5+X)/4=90
X=360-86.5-87-91.5=95
He needs the score of 95 to ensure a A.
RELATED QUESTIONS
A student has scores of 87.75, 89, and 91 on his first three tests. He needs an average... (answered by lwsshak3)

A student has scores of 87.25, 86.5, and 93.75 on his first three tests. He needs an... (answered by Earlsdon)

A student has scores of 67.25, 66.75, and 72.5 on his first three tests. He needs an... (answered by oscargut)

A student has scores of 68.75, 69, and 71.25 on his first three tests. He needs an... (answered by lynnlo)

In order for brady to earn a B in his biology course, his test scores must average at... (answered by josgarithmetic)

Nomar has earned scores of 73, 85, 91 and 82 on the first four out of five math tests for (answered by scott8148,1510112)

A student got a 73, 91, 84, and 90 on his tests. What is the minimum grade he must get to (answered by JulietG)

To earn a A in a class a student needs to have at least an average of 90 on 5 equally... (answered by Theo)