Teachers are always not a big help
So... I got some stuff as math homework. Anyone got a clue?
Need to write this simpler removing the brackets.
2(a-3)+5(a+31)
Need to write it down more easily , teacher isn't a big help.. Since i saw some ppl posting they like math i figured i'd ask
Don't really need the awnser, just a way to solve these questions
Teachers are always not a big help
SammyDoge1 (03-18-2014)
I don't understand your question. Can you rephrase it please? Normally I'd be able to do it.
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SammyDoge1 (03-18-2014)
2(a-3)+5(a+31)=
(2a -6) + (5a + 155)=
2a + 5a -6 + 155=
7a + 149.
You're really 17? :\
I'm not trying to offend but i'm 17 and that's 7th grade math for me :\
Last edited by Youtro; 03-18-2014 at 01:08 PM.
Doc (03-18-2014),SammyDoge1 (03-18-2014),ScotiaBhoysAlt (03-18-2014)
SammyDoge1 (03-18-2014)
That question is way easy.
ex-
ex-x2
ex-
Darakath (03-19-2014),SammyDoge1 (03-18-2014)
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SammyDoge1 (03-18-2014)
Do you know your order of operations? PEMDAS (Parentheses -> Exponents -> Multiplication -> Division -> Addition -> Substract).
Equation: 2(a-3)+5(a+31)
2(a-3) means multiply everything in the parenthethes by 2. You have distribute that 2 to everything inside of the parentheses
2 * a = 2a
2 * -3 = -6
So now you're left with: 2a - 6 + 5(a + 31)
Once again, 5(a - 31) means multiply everything in the parentheses by 5. Remember distribute a.k.a. FOIL (First-> Inner-> Outer-> Last)!
5 * a = 5a
5 * 31 = 155
So now you're left with: 2a - 6 + 5a - 155
Simplify and combine like terms:
2a + 5a = 7a
-6 + 155 = 149
Final Answer: 7a + 149
Here's a video that should explain it very well:
https://www.khanacademy.org/math/alg...g-polynomials1
Last edited by Woodhouse; 03-18-2014 at 01:50 PM.
Formally known as chickeninabiskit
SammyDoge1 (03-19-2014)
Last edited by Woodhouse; 03-18-2014 at 01:57 PM.
Formally known as chickeninabiskit
SammyDoge1 (03-18-2014)
2(a+b)=2a + 2b.
Pathetic
SammyDoge1 (03-18-2014)
Cool Cool, Thanks for the explanation! Think i get it now.
Lol, Its kinda hard to understand if you get 2(a-3)+5(a+31) And the awnser from the teacher, without any explanation.. If you'd told me it in this way, i would have come a far way. thanks i guess..