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Mathematics 7 Online
OpenStudy (anonymous):

(7+2) ^ 2 - 2^3 = Please explain how you got your answer.

OpenStudy (anonymous):

ok....... (7+2) is what you do first cause its in ( )...so its 9...you are left with 9^2-2^2............Follow PEMDAS so 9^2 is 81....2^2 is 2.... so now you have 81+2..

OpenStudy (anonymous):

my bad its 81-2

OpenStudy (anonymous):

Are you completely sure? because if it's correct I'll get a A on my test thank you though!

OpenStudy (anonymous):

Hold up i read it wrong....

OpenStudy (anonymous):

9^2-2^3 so its 81-8

OpenStudy (anonymous):

which is 73

OpenStudy (anonymous):

are you sure????

OpenStudy (anonymous):

YES

OpenStudy (anonymous):

i also did it on the calculator

OpenStudy (anonymous):

try doing it yourself if you dont feel comfortable...but yeah it should be right im a 4.0 student if that makes you feel anymore confident in the answer that i gave you lol

OpenStudy (anonymous):

I used a calculator to and got the same answer so the answer is 9^2-2^3 = 73 right?

OpenStudy (anonymous):

correct

OpenStudy (anonymous):

is this order of operations? if so always follow PEMDAS parentheses exponent multiply divide add subtract!!!!!

OpenStudy (anonymous):

You have to do it in order!!!!

OpenStudy (anonymous):

an easy way to remember is Please Excuse My Dear Aunt Shaniqua....

OpenStudy (anonymous):

Thanks you helped me so much and I learned something new @fluffly_pillow511

OpenStudy (anonymous):

No problem Person!

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