SOLUTION: I had to create a rational expression. I created 120+10(9)/9 based on a real life situation. My teacher said I did great, however he is asking me too try the expression in a differ

Question 86643: I had to create a rational expression. I created 120+10(9)/9 based on a real life situation. My teacher said I did great, however he is asking me too try the expression in a different way which would give me a different answer. He gave me this: [120+10(9)]/9 How would the answer be different from the one I got when I solved it the other way?
My original answer for my expression was 23.3, the answer I get with my teachers way is 130? Which way is the right way?
Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
Order of Operation:
The answer is different because of the order in which it is solved. Using the Order of Operation (PEMDAS):
.
120+10(9)/9
120+(90)/9
120+(10)
130
.
As compared to:
[120+10(9)]/9
[120+ (90)]/9
[210]/9
210/9
23.33

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