anonymous
  • anonymous
6x(5+7)/4-7x2+3x3 i am using PEMDAS and coming up with -5 but the right answer according to the TEAS Test book that I am studying is 13. Please explain why that this is the right answer.
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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matt101
  • matt101
6x(5+7)/4-7x2+3x3 = 6x(12)/4-14+9 =18-14+9 =13
anonymous
  • anonymous
So if subtraction comes first instead of the addition you do it ?
matt101
  • matt101
It doesn't matter which order you do addition and subtraction since they are actually the same function (subtraction is like adding a negative number). In your equation above, you can do the addition step first, though note you are adding 9 to -14, not 14. You will get the same answer. Side note: similarly, multiplication and division are similar functions since division is like multiplying by a reciprocal.

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anonymous
  • anonymous
Thanks for your help math is not my best subject and this test is really import to me. PS. Now I feel kind of dumb because now that you explained all of that I am starting to remember. :)
matt101
  • matt101
No problem - I'm happy to help :)
anonymous
  • anonymous
Girl05 P E D M A S is your order of operations
anonymous
  • anonymous
so its different from bedmas
anonymous
  • anonymous
( ) exponents / x + -
anonymous
  • anonymous
also know as Please Excuse My Dear Aunt Sally
anonymous
  • anonymous
but bedmas b=() e=exponents d=division m=multiplication a=addition s=subtraction so in pedmas what does the p stand for
matt101
  • matt101
BEDMAS and PEMDAS are exactly the same thing (B = brackets, P = parentheses). They rearrange the letters a bit to make fancy acronyms, but it doesn't make a difference. D and M can be performed in any order, and A and S can be performed in any order because, as I mentioned above, they are essentially the same operation.
anonymous
  • anonymous
matt101 thanks i didnt get the difference between p and b but now youve explained it to me so thanks
anonymous
  • anonymous
I didn't know the b and p are the same thing.
anonymous
  • anonymous
neither did i
matt101
  • matt101
Haha well I'm glad I was able to teach you both something new

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