Question

According to this property, 5a + a = 5a + 1a.

A.associative property of addition

B.multiplicative identity

C.distributive property

D.additive identity

HELP!!!

Answer 1

please help.. :(

Answer 2

what you have thought so far?

Answer 3

i think its associative but im not sure..

Answer 4

why associative property?

Answer 5

because it switches numbers.. i think.. if not then it could be additive identity.. i dont know :( im so confused

Answer 6

I'm not sure if this is correct. I remmber when I learnt fields we were allowed to substract a varaible from both sides of the equation. I don't know if you are allowed to do it here but if you can do it then you get:
0 = 0.

Please let me know if I'm on the right course or should I try other way to answer it.

Answer 7

what property do you think it is then?

Answer 8

Well it would be pretty risky to select D but all others seems useless here.
Let me open my notebook and I'll check if It raises something.

Answer 9

I'm still here, just a second.

Answer 10

ok thank you :)

Answer 11

Okay found it/

Answer 12

It's not my answer but I managed to find this in the internet : http://answers.yahoo.com/question/index?qid=20091105151238AAFMsXY

He argues : multiplicative propety of 1 (also called indentity prop. of 1)

It sounds right.

Answer 13

Does it help you?

Answer 14

yes but it doesnt say if its multiplicative identity or additive identity.. and those are the only two answers with "identity" in them

Answer 15

Its the multiplicative identity.

Answer 16

Wait one more second and I'll try to convice you.

Answer 17

See it IS multiplicative identity as : there is written a as \(\color{blue}{1a}\) and multiplicative identity says :

1 * (any no.) = the no. itself

or

a = 1a or 1a=a

Answer 18

http://openstudy.com/study#/updates/4e6f8e410b8beaebb29d04eb

Answer 19

Oh mathlover already answered you. well if you need more stuff I sent you a link.

Answer 20

and a convincing quoting :
"
so the only question is "why is
a=1a ?"
and the answer is because
1a=a1=a that is the identity property of 1 under multiplication
"

Answer 21

by @satellite73

Answer 22

It's B.

Answer 23

ok thanks you guys!

Answer 24

No problem.
Glad to help you.