Question

14. Which equation is an identity? (1 point)11 – (2v + 3) = –2v – 8
5w + 8 – w = 6w – 2(w – 4)
7m – 2 = 8m + 4 – m
8y + 9 = 8y – 3

Answer 1

You could try simplifying each equation.
If it leads to something that's obviously true (say 4 = 4)
instead of a concrete solution (like y = 3)
or a blatant untruth (like 9 = -3)

then it's the identity.

Answer 2

im not really good with stuff like this

Answer 3

ive gone to 3 different schools this year and they all teach different things. its annoying

Answer 4

Well, we got to live with what we got :)
Tell you what, pick one of your choices, I'll demonstrate simplifying it for you.

Answer 5

7m – 2 = 8m + 4 – m

Answer 6

Combine like terms on each side.
On the left, there are no like terms
7m - 2
(like terms are terms with the exact same set of variables on them)
On the right
8m + 4 - m
You can combine 8m and -m to get 7m
7m + 4.

so you end up with
7m - 2 = 7m + 4

You can add -7m on both sides as per the Addition Property of Equality:
7m - 2 - 7m = 7m + 4 - 7m
Combine like terms again:
-2 = +4
And you get something which is false. So this is NOT the identity.

Answer 7

ok thanks

Answer 8

id have to say its this one 11 – (2v + 3) = –2v – 8

Answer 9

do think it is right

Answer 10

Simplify it, we'll see.

Answer 11

ok

Answer 12

oh sorry im back

Answer 13

Sure. Just keep simplifying :)