Really confused. I'm a online student and the instructor taught us how to do this but she didn't use these type of equations so I'm really lost. -3 + 3 (5-12) 6 + =
Last edited by deekay930; Dec 13th 2009 at 10:14 PM.
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Originally Posted by deekay930 Really confused. I'm a online student and the instructor taught us how to do this but she didn't use these type of equations so I'm really lost. -4 (3-7) + 22 (-6) -3 + 3 (5-12) 6 + = Do the parentheses first. Then perform the multiplications. Lastly, add orr subtract. I'll do the first for you. 1. Parentheses because 2. Multiply because a negative times a negative gives a positive. 4. Add/Subtract Have you ever heard of P.E.M.D.A.S.?
so like this? -3 + 3 (5-12) (5-12)= -7 3(-7)= -21 3+-21= -18 ?? Yes, I understand the order of operations.
Originally Posted by deekay930 so like this? -3 + 3 (5-12) (5-12)= -7 3(-7)= -21 -3+-21= -24 ?? Yes, I understand the order of operations. Very good, but you forgot the negative in front of the 3. The correction si made in red.
Originally Posted by VonNemo19 Do the parentheses first. Then perform the multiplications. Lastly, add orr subtract. I'll do the first for you. 1. Parentheses because I'm sorry that was suppose to be :
Originally Posted by VonNemo19 Very good, but you forgot the negative in front of the 3. The correction si made in red. Thanks so much.
Originally Posted by deekay930 I'm sorry that was suppose to be : You know that , so just replace it by
Originally Posted by Bacterius You know that , so just replace it by So the answer would be -8?
Originally Posted by deekay930 So the answer would be -8? Yes indeed!
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