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Mathematics 21 Online
OpenStudy (lovelyanna):

Combine like terms to simplify the expression: 7x + 3y – 2 + 6x – 1 – y2 A. –2y^3 + 13x – 3 B. –y^2 + 3y + 13x – 3 C. –3y^3 + 13x^2 – 3 D. –y^2 + 3y + 42x^2 –3

OpenStudy (lovelyanna):

Umm.. C?

OpenStudy (math&ing001):

hm... guess again

OpenStudy (lovelyanna):

Hm..B?

OpenStudy (math&ing001):

Yeah :D But how did you get it ?

OpenStudy (lovelyanna):

I don't know how to explain, but I do know 7x + 6x are like terms

OpenStudy (math&ing001):

Yep I'm just surprised you got it wrong the first time, it's not like you :)

OpenStudy (lovelyanna):

Ya.. sorry. I get mixed up with these kind of questions.. my bad :P

OpenStudy (anonymous):

don't be sorry, you are just learning

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