SOLUTION: a student scored 87 and 74 on his first two tests. what scores must he get on the third test so that his mid-term average is 85 or higher?

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Question 1156324: a student scored 87 and 74 on his first two tests. what scores must he get on the third test so that his mid-term average is 85 or higher?
Answer by ikleyn(52864) About Me  (Show Source):
You can put this solution on YOUR website!
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If "x" is that unknown score, then you have this inequality to find x


    %2887%2B74%2Bx%29%2F3 >= 85.


Simplify step by step and solve


    87 + 74 + x >= 85*3 = 255


    x            >= 255 - 87 - 74 = 94.


ANSWER.  The student must get at least 94 to get the goal.

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