Verify which of the following are identities.

is an identity.

Step-by-step explanation:

Among the choices, the second expression is an identity, because each part is equivalent to another.

If we develop each part, we will find that they are equivalent

But,

Replacing all these identities, we have

So, as you can see, using the propoer identities, we can demonstrate that the given expression is an identity as such, because it represents an equivalence.

Therefore, the second expression is an identity.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo