Juan scored 4 poins higher on his midterm and 5 points higher on

chitkat

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May 1, 2008
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Juan scored 4 poins higher on his midterm and 5 points highe

I was hoping someone could help me solve this problem . I am completely stuck. Any assitance out there?

Juan scored 4 poins higher on his midterm and 5 points higher on his final than he did on his first exam. If his mean (average) score was 9, what was his score on the first exam?
 

skeeter

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Joined
Dec 15, 2005
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Re: Juan scored 4 poins higher on his midterm and 5 points highe

first exam = x
midterm = x + 4
final = x + 5

the average of the above three scores = 9

you know how to find the mean, don't you? ... so, set up an equation and solve for x
 
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